I am hoping to put mainly performance mods on my GT and am just wondering about wheels. I love the look of a Clean ass Sedan sitting on a perfectly sized set of rims, but I'm still unsure whether or not I want to lower the car, so I was just wondering which rim size is a good one. I hate too large but I also don't like too small, so I was thinking about going with 18s, but I don't want them to look too small, however I don't want to sacrifice performance with 20s. If anyone has any suggestions that would be great.