I absolutely love the exterior of a '71-'73 Datsun 240Z, but finding one without considerable rust damage might put you above the price range you might be looking for. What are you looking to spend on the project? You willing to replace rusted areas on an old Z?

Mazda Miatas have excellent handling, RWD, and you can get the lil turbo 4 banger and around 2500 lbs or so.