Hi,
I agree strongly with one of Tarheel TJ's suggestions: The Quicksilver Mini-Mite. These come up used on Audiogon for under $750 regularly. I bought a pair of these monoblocks, and love their sound through my Heresy I and my Cornwalls. You can check the stats here:
http://www.quicksilveraudio.com/products/mini_old.html
If you buy new, Mike is just wonderful to deal with. However, I think used is safe, as these are well built.
Dave