which amp for definitive technology bp2006?

Any recommendations for an amp in the sub $1000 range (used) that would be a good match for these speakers? I have been looking at acurus, parasound and maybe ati, although the ati is a little over my budget. I am building a home theater but starting with just the main right and left speakers (the bp2006). So I am also unsure if I should start with a 2 channel amp and add later or go for a multi-channel right off the bat. Price is obviously a determining factor.

Thanks for any help.