The discrete processing of the 990 will be better. I haven't owned that Denon unit but I did move from the top of the line H/K.
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Outlaw 990/7500; QSC 2402; Sony dvd;
Dish vip 622; Panny 50PX75U; H/K 7200
Klipsch RF-7,RC-7,Cornwalls,Cornscala
HeresyII,Heresy; SVS 2039pc+; Sonic Super T