I had the same problem. I considered selling my prelude after owning for 2 years because I wanted to get more into autocross and I was afraid being FWD its potential wasnt that great. I looked around, saw some nice mr2's and s2000s and other small agile rwd cars. I thought about it and after thinking it all over I decided I will keep the prelude. It may be fwd, but with a good suspension setup it can handle very very well on the track. It was abig debate and if I had the money I might have sold for an s2000 and put a hard top on it.
I thought about it and came to the conclusion if I've spent all this money getting my car up to my standards and just the way I like it, I might as well continue. I can always get a 2nd car when I get older for the track only, and most of the rwd's I liked were cars that would be a little bit of a pain to drive daily. I just fell into the "any car can be fast, its all about the driver" idea and I will wait until I can get a really nice performance car before going rwd...
have you ever driven an ae86 or similar? You could set one up for 10k and have a lot of fun..
good luck.
mike.