Bah, i dont agree with dont mod your first car and get some NCB, gives you some practice for when you do get something bigger! You dont want to mess up a 3grand car, but its ok if its your car that cost about £600.
Anyway. I wouldnt go any bigger than 15s if i were you. That way you can lower it a nice bit. If you got alloys you can also transfer them over to the next car (if they have the right number of studs).
Try and tidy it up, debadge it, mop it, colour code it, de-strip it. Got any pictures?
Dont however go for the first body kit and lexarse lights you can find
