Hey, that car looks familiar. Did you get waved at by a guy in a coupe of the same color at Frys the other day?
Well, considering my car is nearly identical to yours (coupe vs. targa) I'll tell you the things I want to do to mine:
1) Wheels! I love fuchs, and want some 7&9x16's, but I also want a second pair to put autocross/track tires on. I've also been considering the custom made 17" fuchs.
2) Euro style H4's. There's been a few comparison threads, but I'm too lazy to dig them up.
I think they really enhance the look.
3) Lip spoiler is a nice subtle touch
4) Ride Height -- After new wheels are installed. Proper ride height combined with nice full wheelwells on a 911 really does it for me.
You should be able to do 1,2,&4 for under budget too. Then a good detailing and you're rockin'!
Dan