best used Pre/Pro for $1000

I'm putting together a home theater system and already have a parasound halo a52 5 channel amp and wondering what would be the best preamp processor I could use in the $1,000 range. My speakers are Thiel Viewpoints as my front L and R, Thiel powerplanes as my center and rears and a theil SS1 sub. I've been thinking about a parasound C2 or integra DHC 80.1 or 80.2. Any ideas??