cams will flow more air and so will the compressor wheel upgrade.
depending on which wheel you go with, you might push up your full spool up a bit. im not sure what your at now, but mines at 4000rpm with 62mm wheel, 272 cams, 3.5"downpipe and full 3"exhaust to 10" cherrybomb glasspack and hks hi-power muffler
you can go with a bigger compressor wheel/smaller exhaust housing and still spool quickly, but not have the top end power