You've got a lot of potential there. I like the wheels.
Here's a nice little list for you if you can find the parts:
Fit rear headrests, parking sensors, rear electric windows, seat heaters, headlamp washers, front vented discs, rear solid discs, knock the guts out of the cat, fit a de-restrictive back-box, a K&N panel filter, SDi injectors, a MAP monitor wire, adjust the boost to 19psi...
That should about do it for starters, give you extra comfort and make it a bit of a street-sleeper that will catch a few people unawares!