Lumin X1 dont see many virtual audiogon systems with this?

My Lumin X1 is an excellent sounding streamer DAC.  I also appreciate the fine support Lumin offers in software updates and features, such as the LEEDH processing optional engagement, which is excellent and very convenient is one wishes to go direct to amp rather than use a preamp.  Peter Lie of Lumin very actively participates on a number of forums and is an excellent resource for quick response on Lumin questions/issues as well as offering pertinent general audio advice. 

Regarding Tambaqui, I have not had the opportunity to listen to one, but from numerous reviews and postings, is considered an excellent piece as well.  I, too, had been interested in how these compare, and I have only found a reference of both in a 6 Moons review, https://6moons.com/audioreview_articles/lumin8/5/

jumia,

I do not agree with blanket statement that Lumin X1 is not liked by audiophiles, but do agree there are audiophiles that may priortize desire for additional and various inputs or other needs for their system.  The X1 is an ethernet optimized combination streamer DAC.  I am one of those people who like to have all kinds of options, but admit I may rarely, if ever, use all the options on the equipment I have,  plus the expense of purchasing that way.  The X1 is much more streamlined (no pun intended).  You do have RJ45 ethernet input as well as fiber optic ethernet option (still rare, but a very nice option) for input.   I pull music from Qobuz and from my local storage on my music server.  The USB port on the X1, at least currrently, is for attaching USB music storage, not for a transport or other device.  I have optical SPDIF connections on a variety of devices, but cannot recall when I last used such--been some years for sure.  

My priority was not for connecting a TV to my 2-channel DAC.   I have a hometheater prepro with potential of 11 channels and various surround sound codecs and DACS that I use for that.  You could explore exaSound, for one, if multichannel higher end DAC is of interest.  The Mola Mola Tambaqui does have multiple digital inputs.   I suggest you download the Tambaqui manual, if you have not yet done so, to read on these and what bandwidth specs for each type and DSD compatibility.  I currently do not use a separate transport.  Though I do enjoy reading on new CD and CD/SACD transports, I have not pursued one--still have a CD/SACD player  not now in use.   Many of these new units have streamers and DACS themselves.

I do have other DACs with more I/O's, but 2 of them not currently in use--the X1 sounded better.  They also require separate bridge or streamer for ethernet. 

This level of audio is a significant investment, and there are a great many fine choices out there.  There are multiple professional reviews out there on the Lumin X1, with some being far more informative than some others.  If you have not read this one, it is a worthwhile read, https://audiophilestyle.com/ca/reviews/lumin-x1-review-r860/?tab=comments#comments

I have Roon and use Roon at times and LUMIN App at others.  Roon has a very rich interface, which can supply considerable info on the album and artists.  The LUMIN App sound quality, to me, is clearer and a bit more dynamic (turn off Roon option in App for best quality) while Roon is a bit softer and more rounded to me.   I am more apt to listen to App for more critical listening, while using Roon more often when doing other things in the house as well as listening to music.  I most often do use Roon vs App for its convenience and bridging of genres and expanded playing of artists' music in my library and available on Qobuz.  LUMIN App is included with the LUMIN products at no additional charge, while Roon and Qobuz are fee based.  I enjoy using all 3 of these.  LUMIN is Roon Ready so obviously not a case of user not being able to use it with subscription or trial, but sound quality of LUMIN App is very enjoyable.  I have not been doing upsampling on LUMIN App nor via Roon at this point, so cannot provide my opinion on possible differences in sound quality when doing so on those options.

I am not knowledgable what may be happening for me to perceive the LUMIN App music presentation to offer better SQ, but this opinion has shown up on other forums, for LUMIN, as well for other equipment such as WBF discussions on the very high end and expensive Taiko Extreme.  I look at this similar to making a change of accessory or maybe even some equipment in your system--you note a difference and may find it preferrable to the prior configuration, but probably was not unhappy prior with the system sound.  I find LUMIN App kind of like that offering me an alternative, kind of like a tweak without cost of a new accessory or piece.  You make tradeoffs with music system changes.  

I am not a Roon basher.   I really like the convenience and music information environment Roon offers.  Due to this, I use Roon the majority of the time.  I too have a Lifetime Roon license.  The combination of Qobuz and Roon for me has been great for finding new music, artists and tracing music and history of the involved musicians.   

With Roon and Qobuz, you can add to your Library with Favorites.  Those additons do show up on the LUMIN App as well.  You can also browse and Discover music on Qobuz through the App.  You can make your own playlists on the App that you save or you can browse and add selected albums and or songs to a playlist as well as choose when the additions will play in the order you are establishing.   I have not used Spotify nor Tidal, so unable to comment on them.  

Good luck on your equipment quest.

I just thought of an analogy that might better convey my impression of the LUMIN App vs Roon, which is removing speaker grills on speakers when listening.   I don't know if all speakers benefit from doing so, but mine do.  While keeping the grills on still provides a fine presentation, removing them provides more--clearer and just plain more.   Note I am trying to find a way to express this without the hackneyed "veil lifting" description. Again, best of luck with your decision.