Assuming you want something half sporty, a SOHC 1st gen Neon is a good choice. My very stock one does pretty good in autocross even saddled with an auto transmission, all the DOHC ones have a short final drive and they don't make that much more HP.
I have to ask what you want for your RX7? They must be going up now in price no? I've seen a few at the track and they look very fun!
I guess a Miata would be a good choice too, uses a bit more gas than the neon but is rwd, fun to drive.
Ian
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