I'm looking for a pair of 18's for the rear of my '10 sedan. As I read through the posts, I see most use Z06 wheels. So I have found 2 diff sets of 18x10.5 from Z's, but the offsets are different. Can anyone tell me which would be a better fit to try and not require spacers if possible? First set is a 18x10.5 with a +58 offset. The next set is a 18x10.5 with a +56 offset, then there is a 19x10 set with a +65 or +68mm offset choices. I really am looking for width/fitment first & larger sidewall second. Thx guys!