8 MR rs if you can find one or 9 GT or 9 RS all import btw
Both command strong money, not cheap to run or modify but will see of alot of other cars.
If these are out of budget the fq mr cars are not a bad choice.
Stage 1 is 400bhp easily achieveble with the 80 series turbo, exhaust, fuel pump and map.

Look out for rust in boot floor, boot spoiler meets boot, doors, chassis legs etc

Good cars, just hard to find good examples. MLR will be the best place for info.