eclipse 92-94 if you want an all-out racer...in fwd or awd there are some killers...the current fastest import racing on street tires is black 94 eclipse awd.
95-99 eclipse turbo's are fast and relatively easily modded to 500hp...i've seen a bunch...but it's best to use the 6-bolt 1st gen motor (made up to 1994).
i've seen one in my lifetime that was done well.
300zx's you can find pretty cheap if you go for an earlier model...
wrx's aren't bad and a couple grand into it and it will beat an STI