I'm looking for a 5 channel amplifier to upgrade to from my AVR. I'm using paradigm studio 20's, and plan on getting an Emotiva pre/pro. My budget it around $500, so I'm mostly looking at used amps. Some possibilitys are: Marantz MM9000, Parasond 5125, Acurus 200FIVE, and Sherwood Newcastle A-965 (7 channel, but I hear its a great amp for the money). Its going to be used for 2 channel music and HT, so it needs to perform well with both.