Help find an amp for Soundly speakers

A buddy of mine has a set of Soundlab Dynastat speakers and the Belos 150 he was driving them with has died. He's looking for a used amp of sufficient power to  drive his speakers for less than $2,000. I always felt his speakers could use a more powerful amp to properly drive the panels than what the Belos provided. Any suggestions on what to look for?

Thanks,

Joe Chip