My old Harmon Kardon (AVR20 II) reciever just went on me after 8 years of loyal service. I am currently looking for a new a/v receiver. I am not up to date on the newer technologies/products. I am looking to spend about $500. I have currently looked at the following two: Harmon Kardon AVR 330/300 Denon AVR-1905 Does anyone have any advice/input into one of these over the other? I am open to other suggestions as well. My system is medium sized, Polk Speakers: L and R are RT 7's Center is CS200 Rears are M2's My Sub is an Acoustic Research S108PS Any info would be greatly appreciated.