Integrated amp + dac for Focal

If you can find one used I suggest the Pass Labs INT-250. I have one
connected to a ModWright OPPO and B and W 802 D3s. The sound is simply extraordinary. The Pass can deliver amazing dynamics and all the power you will every need.  I have not heard a tube amp that can do what the Pass does in the bass/lower base while producing excellent mid and highs. 

Micromega M-150

I have Pass x250.8 and xp10 with Bluesound Node as my source running into Focal 1028BE 's in a dedicated purpose built sound room, 13 x20 on a concrete slab, insulated walls and some sound treatment. The system sounds great, Pass is class A to about 30 watts, wand rarely crosses into AB, the Focals are the best speakers I've owned and are musical, tight, fast and have incredible detailed and deep bass - when it's supposed to be there. They like and handle power and current so I'd go the route of a Pass powered system to get the most current and musicality, no tube set up will have enough current and control in my opinion. 

Luxman l590ax