Depends on budget but loads of older great RWD's out there... another vote for the Porsche 944 range ( S2 the best all rounder ) and the E30 325i, but prices arent as cheap as they used to be for a good one, and to run them on a budget you need to be able to work on them yourself.
Or for a £1000 budget for pure, simple RWD fun ( only 2 seats mind, but cheap, distinctive and very mechanically reliable ) the Toyota MK1 MR2. I did 80k in my old one, only thing that ever let me down on it in 10 years were the alternators, which seem to die quite quickly. Still got it in my back yard under a tarp, i just couldnt bear to part with it was so good
Buy a good one of these and you will have more fun than should be allowed for so little money