I would also vote for the Art Audio over the SF. I also admire the Atma Sphere. I use OTL's in my system (tenor) and they are special. I have heard nothing but good things about the Diavlo and Jota.
Art Audio amp/Sonic frontiers 2SE amp
Have a pair of Soliloquy 6.3's, and I am deciding between Sonic 2 SE, Art Audio Gil or Diavolo power amps. For the near future I will be useing my Krell KRC-3 preamp, but plan to go to tubes there as well.I currently own Cardas reference balanced interconnects now and I noticed the Art Audio equipment does not accept them, only rca. All opinions welcome. Thank you all very much.