s13 = older body style 240sx 88-94 i believe
mr2 turbos are a lot higher than what you want to spend usually
dsm's are fun and cheap but they seam to break alot once you start modding big
leave them stock and they'll out lasty your civic
i know of 13 modded dsm's between 10 friends and 2 run!!!! you do the math
i am only critical of dsm's because i had one and it was a piece