Apple iPad music streamer

Ok question from a newbie here:

i recently got a Bluesound Node Streamer/DAC for my home stereo and stream from my ipad or iphone over wifi.  I stream Tidal - Love it.    In my office i just connected an ipad via headphone jack to an amplifier.  Sound is clearly - okay not great.  Trying to decide in my office - to either 1) get a streamer for there too or 2) get an external DAC and run my ipad thru that to my amp.  It sounds like option 1 will provide higher resolution audio but it also costs more.....thoughts? Thank you, 

I have read on the Qobuz website that the only way to stream wirelessly Hi Res 24 bit from an iOS device is by using google chromecast - is that the case ?  Anyone know how to do that with an iPad?  Appreciate any tips.

office set up:

ipad. wired to Linn majik AMP - but sound is crap - so new set up will be:

ipad wireless ?  wired ??? any recommendations here -  (i have good wifi available) to Audiolab 6000N streamer.

I have been using Tidal.  I checked out Qobuz but was confused because it says the only way to stream Hi Res 24 bit is via Chrome Cast.  I consider myself reasonably tech savvy (but i'm 56 not 26) and i don't understand WTF that is - i'm guessing the protocol for transmitting wirelessly to the next item in the chain.  But i don't know (yet) if the Audiolab is Chrome cast compatible. if that is even a thing.  

Thank you - 

oh speakers

Totem Arros