My stepfather is the only person I have known with a reliable RX-7. Don't get me wrong, I wanted the car bad when I was younger but they tend to have their share of engine problems (as previously mentioned).
Someone mentioned a dodge stealth r/t turbo. Same thing as a 3000gt vr-4, just cheaper.
For the money you are looking to spend there are lots of options, if you don't like working on a car, or want to funnel money into it there are certain ones you should avoid, it all depends on what you are after.
You could always get a used volvo 240 and drop a big-block in it
