370 black wheel rim and size
 

i'm going to use my stock tires which are for 18inch rims...i cant find rims that i reallly like which are the dimensions that go with stock.. the ones i like i would have to get them 4s at 18x8 or all 4 at 18x9.5 what exactly am i losing or ganing by switching or is there not enough to make a difference... some feeback would be great