what you can do is a 2.3 VTEC, that's like a LS VTEC, you can put a turbo in your Si make sure you change the internals, you have to change them any wayz, and just drop a H22 head on this think, and I think this gonna be better if properly build, because of the dissplacement, and lower compresion, and I also heard, I am not sure but some people told me that H23 come Sleeved stock, so I don't know do what ever you can afford,
my .02