i think you could get a set of SPS cam but you would do better if you install a set of 45/50 or 50mm full exhaust, SPS cams, cam ECU and open up your airbox all at the same time. most bang for the money. good luck
i'd also recommend that if you do anything with the cams (either altering stock cam position, or installation of SPS cams), that you wait until a valve-adjustment service. take advantage of the labor charges. if they're in the motor adjusting the valves, it's not that far a cry from doing some cam-timing work as well.