Drive one with taller sidewalls before you jump ship. I clearly noticed that the 22" wheel units handled slightly better than the 18" wheel units. I know there's more variables, but the taller sidewall allows for flex and it can wander on the road. Will YOU notice it? maybe, maybe not.
I have the 18" "rims" and think they're the best way to go. Nicer ride, they don't wander in the least, and they're far less likely to get dinged up. 22" "rims" make a statement, that is, you value fashion over function. Also, you'll need to pop for the CCD to make the ride tolerable with the 22's.