i say get 18s, if you live somewhere with alot of potholes (your license plate is ny) you will crack 19s cuz your gunna need to have some super lopros. i say get 18s and coilovers, or stick with the 17s
20s will work if you have an agressive kit and on air..... but normally 20s look WAY too big for our cars, unless you like going for the rapper SUV style.