If you like incredible amounts of detail and little-to-no coloraton, I'd go for an ICEpower amp ... like a used PS Audio HCA-2. There are a few on audiogon right now for between $700 and $750.
I haven't heard the Emotiva BPS-1, but I did have a MPS-1 here for awhile and thought it was one of the most boring amps I've ever heard - completely unsuitable for any stereo playback. I can only hope the BPS-1 is better.