Which JDM H22 Have you got? If you have a standard JDM then JDM Type S Cams could be a sensible upgrade, although you might have to check the lift in case the pistons are required as well (JDM pistons are taller for higher CR). Skunk2 and HKS will probably be a good place to look for Cams but as with any engine you need to know where you want the power and how much rougher you can stand with the engine 'off cam'. With a VTEC controller and a good set of cams you might be able to raise the entire power curve slightly but it will be a costly process!