Both would be about the same price, both are 200x2 at 4 ohms. However the MB Quart shows 800w bridged and the IS2150 is 600w. I'll be using either one to run 2 ED 9kv2 subs at 4 ohms. The extra power would be nice, but I don't really need it, so I'm just wondering which is the more reliable and cleaner sounding amp?