Bud, congrats on your terrific system! The S5's are remarkable speakers, and you are feeding them plenty of Class A power which should give you a lot of bottom end grip and headroom. Warm, tube-like amps such as Pass are a good match with the S5's imho. Also, good show with your audio racks. I am a fan of Mapleshade as well. They make good value bulletproof racks which look beautiful. Btw, it looks like you went for the bronze M-cast finish, though it's hard to tell from the photo? :hmmm: Overall, good job Bud!
Cheers,
Bodhi.