Merlin VSM-MM (with battery BAM and "Z" footers, if possible). The newer -MX is better, but will be out of the price range you specified.
I'd like to second the Tyler Acoustics suggestion, as well as the Merlin. The front ported nature of SOME of the Tylers make them an excellent choice if you are constrained - although I still would recommend getting as far away from that rear wall as you can. The Merlins with BAM would give roughly the same frequesncy range as the Tylers. If you're willing to go used, you can probably find either in your price range, provided you're patient.
The Spendor S-8 is surprisingly full range (quite amazing for a 2-way) and worth looking into. This speaker goes quite low, is capable of filling a large space, and throws a big image even in a small room. In other words, it is quite versatile. My only quibble is that it has a slightly "plastic" sounding coloration.
I don't have extensive experience with the DeVore Super 8, but what I heard at CES (actually, at the nearby T.H.E. SHOW) was quite promising. This is a VERY musical, easy to listen to speaker, that, unlike so many modern designs, does not sound lifeless and constipated. It was hard to tell how good it sounds coupled with "normal" electronics because it was hooked up to some quite pricey Shindo electronics.
I recently heard the latest ProAc speakers and they too, sound reasonably good. I believe one of the models I heard was in the $4,000 range, the other was $2,500.
Some of the Nola (formerly Alon) speakers might fit the bill. The use of open-back dipole radiation for the midrange/tweeter gives it a big, open image.