Hey Dalton,
I auditioned Parasound amps awhile ago (eventually decided on Aragon amplification), and found them very good for the money paid. You won't go wrong with the 855 (bear in mind it's MSRP dropped to $699 recently, so it'll be easy to find in the $400 to $500 range) - though depending on your room and speakers (mainly, among other things), it may be a tad underpowered.
Hope this helps.
Christian