I've got to agree with the Zakmeister on this one. Work upwards towards your prefered car, both in terms of cost and your own driving skill.
You want RWD?
Buy something that you can afford to bend the rear axle on when over-enthusiam slides the rear into a kerb. Something with sensibly sized tyres that you can give serious stick too and afford to replace regularily as you learn how the drives on the limit and beyond.
The obvious choice is an MX-5. Forget girly, there's a very good reason it features in so many handling days across all sorts of motoring magasines. It's the same reason it keeps winning, the damn thing is properly rewarding to drive.
You can afford a pretty decent example and have plenty to spare to spend on a track-day every couple of months until you've got the skills (and the age) to afford something even better. Some minor fettling will also give you a genuinely quick car and no fettling will help you keep the points at bay and hold your insurance at a decent level.
If you must insist on RWD with silly insurance and for more than a few thousand quid (200sx territory), then have a bash at a late Porsche 944 (non-turbo) or 968, both legends of sideways lore. Then I will happily lynch you before nicking the keys and powersliding into the sunset