GSR, with $4000 you can do a GSR with cams, clutch, mount kit, more if you shop around.

H22s might be "better" for the money, but they have:
1) Shit transmissions when it comes to GEARING
2) They dont have as much aftermarket support
3) They are VERY inconsistent, some make 155whp, some make 175whp stock.
4) Cam choices suck, except for PRO series from SKunk2 IMO
5) Cable shifters, require ALOT more wiring and fab work to fit in a civic
6) Emissions NEARLY impossible if you care about it

GSR, best motor for the buck hands down.

If you plan on doing the work yourself, id prob get an ITR motor, for the Tranny and the cams. Its the best motor to have if you plan on doing NOTHING to it, ask Tom aka b18C5_eh2. He has had his ITR for more than 5 years, an ran 13.2s in it, BONE STOCK motor. He also has quite a few kills includnig an h22 EG that made 193whp