What he said. If you dont lower it too much and get the right offset 19's will go straight on, and I see no reason why 20's wouldnt go on with a little bit of work. I've seen a set of 19's go on with M-tech suspension and no arch work.
<img src='http://img.photobucket.com/albums/v225/2ndclasscitizen/martinmkcsig.jpg' border='0' alt='user posted image' />
<span style='font-size:9pt;line-height:100%'>It's better than doing crack.</span>