There are a couple of other threads about amplifiers and SL. I created one about 1-2 years ago. Lamm M2.2 is very good, and possibly one of the best below nosebleed prices, if you consider 10-12k below nosebleed levels. (Disclaimer: I have a pair of Lamm M2.2 listed for sale, which I used before I upgraded to nosebleed levels with an Ypsilon Hyperion, both of which are hybrid amplifiers, with a bias to class A.)