Just bought 06 GT. Will have lowering kit of 1.5" in front/back. Would like to go largest rim and widest tires in back without affecting handling/ performance too much. Also don't want to take any chances of wheel rub under extreme conditions. As many opinions would be greatly appreciated...Thanks Also if anyone knows of a decent rim/reasonable price let me know (looking for the black/gunmetal or chrome look) thanks again..............What size should i go???????????