I'm driving mine with B&K M200 Sonatas and they're great. I tried Conrad Johnson MF2100's which were nice but not like the B&K's. Mine are vintage 1993 (I also have a pair from the first run in late 80's). The M200's can be found for ~$500 a pair +/- 100 used. There's a pair of B&K Reference 220m's for sale on Agon for $977obo - these are the updated M200's
I previously had a Parasound HCA2200 which would also do very nicely though I didn't have my Manis at the time so I can't attest 1st hand, but it has the current to drive them. The HCA2200 can be had for ~$650 +/-. I would recommend it highly.
I'm sure you can find an amp closer to your budget, which may be better than these - but I'm very satistfied with mine.
I previously had a Parasound HCA2200 which would also do very nicely though I didn't have my Manis at the time so I can't attest 1st hand, but it has the current to drive them. The HCA2200 can be had for ~$650 +/-. I would recommend it highly.
I'm sure you can find an amp closer to your budget, which may be better than these - but I'm very satistfied with mine.