If you're looking into RS's you should check out
RS25.com - The Subaru Impreza RS Owners Club - Home

Alot of people are swapping the wrx or sti engines into their RSs. As long as you got the $$$ and the time.

I myself have two 00 RS's. Ok well one's mine and the other is the hubby's. I had a 98 before the accident and it got totalled. But check out that site and search. Happy hunting.

Cheers
Cheryl