I've been asking this question too and honestly bro it's not worth it. If you're going to keep your car N/A then leave it stock. If you want to sink some money into it and want to do it right, get a used turbo kit, slap that bad boy on, a few supporting mods, go till your tranny dies, then sell car or purchase new tranny.

EDIT: Not really a do it right type scenario that I just described but it's one of many options to go with and I know members suggest to go turbo and save some money up.