sonus faber strad power amp suggestions

i could spend on the high side of $5000 for the right piece,I imagine a 5-channel preamp upgrade would be additional. I am leaning toward Pass Labs ,is 150.8 enough...or 350.8? I listen mainly to dvd-a and blu-ray formats(steve wilson prog rock remixes, highly detailed stuff). so $10k+ for the two pieces should be doable

the "strads" are obviously stradivai ,i am a "speaker guy" and have spent 50 years to reach this level of speaker system. That said, my orientation is "power is power".I am very naive with respect to amplification. my room is roughly 25 by 35 and my set up "sounds great", but i seem to be selling my speakers short with the KAV unit. so any feedback on power amplification would be very helpful!