What Amp to drive Apogee Centaur Majors?


The Centaurs line works very well with a 50 watt amplifier. That is the minimum power required. I prefer 60 to 100 watts. What amp would you mate with these speakers?
I'm using a Van Alstine tube preamp, Arcam DVD as a transport/Scott Nixon Tube Dac with 2 Adcom 535's. I have 1 Mk II an 1 original. The original has speaker A and B and that actually sounds good as they allow me to biamp at the moment sort of but it's a bit forward sounding. My modified Dynaco ST 70 does a great job in the midrange but the bass is not controlled as I like. So, I'm looking for suggestions of what amp some of you are using with your Centaur Majors. These are the 40" ribbon with 10" woofer. I also have 2 12" subs and they are acoustic suspension Dali 1.2s. Any input will be welcomed.
ponnie
I seem to remember H2O amplifiers were designed around the unique load requirements that Apogee panels present.

http://www.6moons.com/audioreviews/h2o2/1.html
I have a pair of centaur minors and was wondering how much difference I'll hear from Aragon 4004 mk2 vs McCormack DNA series. Also would like suggestions on preamps
Thankyou
Had Minors. McCormack amps/preamps would be my choice. DNA series are most affordable. Preamps - ALD Delux by McC