cubanprince1 depending on what your setup is your best bet is to turbocharge the SR20DE. They are strong enough to handle most street setups, but I have no idea on what your running. www.sr20forum.com would be better for you than here, that forum is mainly FWD SRs.
I am running a Stock SR20DE with my turbo setup and cams, my friend ran stock cams, stock pulleys, and a T28 and hit 300whp with a stock SR20DE. But if you want to build it than build it, but since JDM SR20DE's are 400-500 bucks, why go through the trouble if it will hold it just fine.