you should prolly post somewhere other than the mp3 thread. your deciding to upgrade? why? it would be cheaper just to buy a turbo than to upgrade to mazdaspeed ya know. If you get the thumper kit from MAM ($4500) you could EASILY kill any stock msp and prolly a few srt-4s too!
I sold my MP3 a year ago. Have an STI and looking for a speed for my wife. Sorry for posting in the wrong place. It said I had no access to the mazdaspeed site.