What is the right choice?

I appreciate all the feedback I received from this post, however I have not had any comments on the IOTAVX S3/P3 possible decision. This would be an upgrade to support the need for a phono input, a DAC and some additional wattage. Does anybody have experience with this brand?
Now I am adding an additional question relative to another one of Zero Fidelity's high ranking reviews, the Buchardt S400 bookshelf speaker.

Does this pairing makes Hi-Fi sense? IotaVX and the S400? Is this a sonic upgrade from the NAD C356 and the PSB Imagine B's?

Sean from Zero Fidelity, care to comment?

Jrpnde, yes at the time I heard the Synchrony 1s they were the PSB flagship speakers. I did not hear then with NAD amplification. They were driven by a Rouge Chronous Magnum.  I can't comment regarding comparison with the Imagine series.  

Musicvt,

I was noticing that on the tread. Not actually answering what you asked about. Too funny. Anyway, I have for probably 9 month now owed an Iotavx sa3 integrated and I absolutely love it. I also watch Zero Fidelity and being one of about 3 or 4 gear reviewers on YouTube that I watch, there is no one out there better than he is at describing sound and put it into words that are easily digestible, understandable and relatable. I agree whole hearted with pretty much everything he says in describing the Iotavx. Love the sound. Bluetooth very clear. Can’t speak for the phone stage as I don’t use it. Sound seems to be very neutral and detailed. I can tell a big difference between my Onkyo Home theatre receiver and the Iotavx when running my Klipsch rp-600m speakers. Just a clearer and more detailed sound. Very well balanced throughout the low, mids and highs. I haven’t tried the stack yet, as the single 45watt Iotavx ps3 is very capable of powering those sensitive speakers to very high volumes. I don’t have really any experience with higher dollar DACs, so my opinion may not be worth a ton. But I know good sound when I hear it. I played piano for 5 years as a child and got into some fairly complex classical pieces towards the end and my pitch is perfect. I like to think I have a good ear for music for that reason.

 I’ve primarily have used avr’s in the past, but there is to me just a staggering difference between most of today’s modern avrs (home theater listening) and 2 channel critical listening with a dedicated integrated amplifier. I currently have a pair of Klipsch Forte iii on order and can’t wait to hook up the Iota to them. I can’t escape horn loaded speakers now having owned the rp-600m. Just the clearest sound imho. Anyway, good luck. Let me know if you get one and what you think.

Azmike1,
Thanks for the feedback on the Iota. I'm surprised you did not purchase the stack. However, you might want to after hearing the Forte iii. The Forte iii is a lot of speaker.

I ended up with a pair of PSB T2's, so i have my original pair of PSB B's up for sale. I also made a drastic decision and acquired the PS Audio m700 monoblock amps and the PS Audio GDAC pre/dac. With the trade-in deal that PS Audio offers you cannot go wrong.
I now have a system that i would consider audiophile 101 and the sound stage is night and day of my old system. 

I also bought the Schiit Mani for phono pre for my ProJect TT. So my sources are LP's, CD's, Squeezebox and Qobuz. The CD's and Qobuz through the PS Audio DAC has the best fidelity out of all my sources.

Enjoy the music.