I owned a pair of Mark Levinson ML3 - similar to ML2's but double mono in one chassis which I loved. Very few for sale though...
The other class A amp that I really enjoyed was my Musical Fidelity A100, a higher power version of their well respected A1 with a rich warm, fluid sound. They later introduced an even larger version A200 and mono-blocks A50 which occasionally become available on the market but I have never heard them. However the best of the A series was definately the A1000 (not A1001) - this was awesome ( a Tim e Paravicini of EAR design I believe) if you can find one.