Pass Labs XA60.5 experience?

The speakers are 93db @ 4ohm.

Can you demo one in home?
I'd try the 30.5 first and at the loudest levels, see how much the meter flickers.
If you don't leave class 'a', look no further.
If too much meter flicker, you're into A/B which you may not want.
The 30.5 is around 200@4 per side, 'at redline' which is firmly A/B.

even if you are pretty.....ambitious....I can't see needing more than the 60.5

Proviso. IF the speakers present a wacky load from the phase angle you may need more power. IF they drop to some crazy load impedance you may need more powere, especially if the impedance dip and high phase angle are at the same frequency range.

Mr. Magfan thanks much for your words. 30s would be so easy at $3500 used. The only other amp I'm considering short term is the fuel efficient Krell 302e on a splurge. I don't like that Dan and Brett have been minimalised, however, kinda pisses me off and I don't want to reward the new blood with a purchase. The Momentum isn't realistic for me in 2012. It seems a good time to be looking to purchaser an amp, choice-wise. Off subject, computer based high-end hires with the likes of HDTracks, LINN, 2L at 352.8k, Antelope Zodiac and Benchmark DACs, Sennheiser headphones, etc. is peaking my interest by the day. Just saying..

I have a pr of 60.5's. I love them.
If you are into mono amps then get these (shorter speaker cables, longer interconnects) There is the advantage. Also separate power supplies...

As a general guideline, what sensitivity should a person be looking at matching these with? Over 90db at minimum?