I gotta go with the b16 myself... but maybe I'm just showing favoritism. drmcivicsi is right though, an ls/vtec would kick ass. It all depends on what you plan on doing with the car aswell. The thing about the b16 is if you do plan on going boost, the compression is gunna be tricky. Im not sure, but boosting the b20 is gunna be more possible. it all comes down to $$$