i had a b16 in my rex before. it was a lot of fun. but i have a crvtec now and its even more fun ls will give u better gas mileage plus a huge bump in power from where you're at. b16 will make more power but you'll have to wait for vtec whereas a b18 will make power all the way through. either way, ls vtec is your best bet for all motor, b16 is probably smartest for turbo