i have those wheels on my WRX. Black Pearl 18"s. love them! i have Dunlop SP Sport 9000's on them. my car is lowered so i initially put a bit of camber on the rears but it's really not needed. they look awesome and this wheel/tire combo is lighter than my old OZ SL's 17"s with Dunlops. i would say get them, then i would say NOT cuz i want to be the only one with them!
BTW: i have read some specs showing these weigh 13.5 lbs but i have not weighed them myself. they are lighter than my last set up tho