Hmmm. The blingy wheels kind of detract from the picture, but I can honestly say that you might not be too far off--it's not too out there, that's for sure. Seems to have lost some of the sexy curves of the Boxster though and replaced them with a more S2000 sort of look that I wouldn't approve of, but the headlights are an interesting statement.
Aaron, your sketches are definately getting better I miss some contrast in the image, and some tighter lines. The particular car u made here resembles an S2000/Z4 - and less a 2008 Boxster.
Check this COOL! link for inspiration and keep up the good work!
I like both sketches. There is only so much you can do and still make it "look like a Porsche". How bout a wide body Turbo version? Porsche went there with the 924/944. Why not the Boxster and Cayman. Let the 911 stand on it's own merits.