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
Solid State Amplifier: Pass Labs X350 or higher
Vaccum Tube Amplifier: Audio Research VT200 or higher
My bad...
I am courting suggestions on the purchase of a class A biased amp. Evidently, many of them are also Class A in quality.

My apologies and many thanks!
Sleeper of Class A amps: Yamaha M80 The whole M series is awesome. It was just as clean as my Threshold, just not as warm. Handles 3 sets of speakers and has built in gain control. Awesome bargain.
Plinius SA-100 MkIII makes me happy. Very warm detailed sound, great bass. SOUNDS BETTER IN CLASS A MODE, but I also believe you shouldn't limit yourself to class A. I'm looking to experiment with a good tube amp when life settles down a bit. The Cary 805c is supposed to sound good w/ my speakers as well(Silverline SonataII-which I adore).
I know they're a bit rare, but let's not forget the BEL 1001. Exceptional performance and often overlooked because you don't see them for sale much.