looking at buying some new wheels for my car. i currently have rays but looking for something different. i think im going to stick with 18" but the ones im looking at are team dynamics and there 18 x 8" and 18 x 9" on the rear. i believe the rays are 18 x 8 " on the front and 18 x 9.5" on the rear ( could be wrong, wouldnt be the first time ). i take it the 0.5 wont make much of a difference, or will it? if so how? also would it be better to get spacers for them? thanks for your help as i really dont know much about wheels?