I appreciate all the thoughtful advice, this really is a great forum.
My car's pretty well sorted now. Suspension is new (Bilsteins, H&R springs, new bushings etc)., motor is rebuilt. Engine develops good power up to about 5500. It idles properly and is a faithful daliy driver.
The motor is coming out for a repaint of the car and that's what got me thinking about more performance. Based on what I'm hearing here I'll stay away from the cam (and potential K-fish woes) and maybe look at a header and exhaust if anything at all. It really is a fun car to drive as it is. I'll stick to modding my WRX Sti.
And Delia, next time you're in Toronto, dinner, no problem! We have a great 02 community up here in Toronto, we just hibernate for a few months each year.