Try a search on the topic to see what various people are running, lots to choose from.
245-45-17 front and 275-40-17 rear is a common staggered combo. Those sizes are approx. 1" smaller in diameter than original, so if the car isn't lowered, then the fender gap ends up looking pretty huge.
got ya. i have seen some people running 18x9's all the way around. did these require any modifications or did they bolt right up. how would the fender gap be with 17/18 inch wheels and the car lowered 1.5 inches?