I own an MC402 and have owned and auditioned tube power amps. Advantages of 402: stonger tighter base and realistic transparency without giving up warmth. Advantage of tube power amp: more atmospheric midrange, possibly with slightly deeper sound stage and better signal to noise ratio. All sounds but especially massed instruments and piano will be slightly fat, smeared or blurred possibly in a pleasing way depending on your taste. I prefer reality as I go to a lot of live concerts and therefore the 402.