I've had both 18" and 20" on my 67 camaro. I like how the 20"s fill the open wheel well and to be honest, the ride surprised me. I was expecting a harsher ride after riding around in a friends audi with 20"s. No, I don't autocross the car! But that is because the painter went crazy and took the car a few levels above what I was looking to have done. Not complaining about how it turned out!, I just could'nt imagine cone marks down the sides of my car. You'll ALWAYS have people with different opinions on how a car should look or handle. If some people think I'm a poser, so what, people have only said positive things about my car since it has been finished, yet to have someone say "Those 20"s on your car look stupid!". And everyone I've ever taken for a ride have always had one hell of a grin on their face!
