I was thinking about getting the gemstone blue diamond 7.1 amp to go with my yamaha 1400. After looking at various other amps I saw the Crown XLS 402A Power Amplifier (400w @ 4 ohms). Would this amp be sufficient. I could pick it up for $300. I realize i'd have to buy 4 of them for 7 channels but that would still be half the price of the blue diamond. Is this amp high enough quality for ht? What are the advantages or disadvantages of going with the crowns over the blue diamond other than space savings?

My setup will be:

yamaha 1400
vp150
2 mt80's
4 qs8
dual svs 16-46 cs-plus subs
amp ?????

I'm going to be building a ht room in my new house 20x25x9. No windows or openings.

all input is appreciated. Thanks, Steve