Class A amplifier choice, need suggestions


What is your favorite class A amp and why? There are many here on Audiogon... Levinson, Krell, Pass Labs, Plinius and an occaisional Accuphase A50V. I am driving Proac Response 3.8s (88dB efficiency). I recently auditioned a Pass Aleph 5 and was stunned by the presentation at only 60wpc.

Your input is much appreciated!
blueswan
I agree with JamesWei. The Pass X600 is one awesome amp. Unbelieveable with Revel Salons.
Need solid Class A advice contact Jon Soderberg at http://www.rsvlonline.net/vintageamp/ Jon worked with Nelson Pass at Threshold for many years. Bought a Forte Model 4a Class A amp from him and could not be happier. He may have something you can use,or get some really first hand advice from him. He did have a killer Threshold SA 3 Class A amp for sale a few weeks ago.
For solid state amps you really can't go wrong with the Pass Aleph series. I have Aleph 1.2 monoblocks and think they are fantastic. I have a friend with Pro-Ac speakers and he drives them with tubes and they sound great even though the amp is class A/B push-pull. You may not want to limit yourself to pure class A amplification.
Once again, I think we may have some semantic confusion going on here between class "A" amplifier bias operation, and Stereophile's 'Class A' of their Recommended Components listing.
Zaik correct: the PS Audio is not biased class A at all; its digital PWM output is, if anything, biased toward class C (which is actually not biased at all, but at cutoff).
In the class A catagory - I love my Accuphase; my Ayre amp isn't half bad either.