If you look at my pic of my old one I was running 18x10.5s with a 275 and decent profile. If I dropped my bilsteins down more would of still been no issues what so ever. I had mine set up for more perfomance rather then looks though.
19s I dont know, for street and looks yeah but for driving hard and track day's 18s all the way. Cheaper tyres more side wall.
18s with massive dish look almost the same size as a dished 19 anyway IMO.