I borrowed a friends Mc402 (for a week) to drive my contours s3.4's; It was a very nice result. Very transparent, natural sound. Dynamics were not quite as far reaching as my (then) pass x250.5, but the Mc402 had a tad more warmth. I say, with the dyns the mc402 fell to the warmer side of neutral (but with open top end and mids), and the pass a touch on the cooler side of neutral. He was very happy with his mc402 and slp-05 into the same (s3.4) speakers; indeed it sounded fantastic. I would def consider one of the higher power Macs to go with the dyns though. They do love the juice.
