I am in the middle of finally building a HT system (seperate from main audio system) and can't help but think these little class D amps are perfect for HT, especially with the SMPS as they are very power efficient. I only need four channels (no center) at the moment, but 4 ncore + 2 smps1200v400 would be a killer Mch amp. I'd set it up so that one smps would drive the right main and right surround with the other the opposite. Surround channels never draw much power and you maximize stereo seperation.
Leave enough room in the enclosure and you could add more down the road.