If you can accommodate floor-standing speakers with some space behind them take a look at Magneplanars. Either the MMG or the MG12 would be under your cost ceiling and they both got a "walks on water" review in a recent issue of The Absolute Sound. You can even try the MMG at home for 60 days free except for the freight. They sure made a believer out of me.
If your tastes require strong bass below about 45Hz or lots of "slam" you'll also want a good subwoofer, which you can couple to the MMG without breaking your cost ceiling. I understand the bass controls on the 2150 make it very easy.
One caution: the Maggies are not highly sensitive / efficient. They are 4-ohm speakers and need a high-current amplifier. The 2150 should be able to drive a pair of them to 110-db peaks, which is a bit more than a symphony conductor's ears get when the orchestra's playing fortissimo. Only you can decide if that's loud enough for you.