I have two pair of L80Ts converted with T3 crossovers, the port mod, and the extra insulation in the top as per Gordon. It still only gets them a so-so rating compared to many other JBLs I own. If you're looking for the best buy, find a good deal locally on the L5 (or, if you're lucky—L7). They're a bear to ship so most won't, making them a cheap local purchase. The L5 does everything well and the L7 is incredible if you have enough power and enough room for them. Getting into more money but often found in your price range would be the L96, L112, or 4410 or 4412 models. There's always a discussion comparing the 10-inch three-ways to the 12-inch three-ways. They're all fine speakers.
If you want to be a trend-setter, try the self-powered JBL LSR305 or LSR308. They'll fit your price range, new, won't need an amp, and image like nothing you've ever heard. I can't stop listening to my 305s and I can't image what the 308s must sound like!