Compare Purif-based amp vs Class A/B (Code No 8/ Halo JC-5/ Pass X-250/ Anthem STR)

I can't answer yet, but I'm building a DIY amp using the Purifi modules and also have a JC-5. The sound signature of the Purifi is going to depend a lot on the front-end driver. The Purifi module has low input impedance (1.5K to 2.2K depending on frequency) and modest gain, so it needs some form of buffer/driver board to provide an easier load to drive. 

The Purifi module itself is extremely low distortion and noise, so the front-end board will really determine the way the amp sounds. I'm planning to build/buy a few different driver boards (including one with triodes) to experiment and see what works best in my system.

https://www.audioasylum.com/forums/amp/messages/23/237586.html

The VTV amp mentioned above is the bottom of the line stereo amp from VTV ($979 including shipping to your door).  The versions with the discrete op amps and discrete regulators are better.  Mono or dual mono stereo will get you a little more too.  He also has a version with a tube buffer if you want that kind of sound.  Then there are the advanced tweaky mods that I do.

There is a lot more that determines the sound than just what buffer you use on the input.  Every single thing you do changes the sound.  You might want to read what I do to get a little info on tweak possibilities.....especially if you are building your own.

Nothing against Purifi or Class A/B amps, but with your speakers have you tried any tube or Class A amps?  Is this an energy/heat thing?  Personally I’d love to hear your speakers with something like a Valvet E2.  Just curious.