A buddy of mine in Chicago is also a dealer for Clayton and I've gotten to spend a few hours with the M-200's on a couple of occassions. These are really terrific amps with plenty of jump and a very smooth presentation. jmlm has it about right although I would say they don't give up any detail to be that liquid and smooth. If you're near Chicago I could hook you up with him and you might be able to set up an audition to go hear them.