Im not trying to diss you here or anything, but please please dont get 18'' rims...17'' are even pretty gay if you ask me. And trust me i had 17'' on my GSR for like 3 months. Only because i bent my other rim and didnt feel like putting civic steelies until my rotas came in. I also had 18'' rims on my civic when i got them and sold them the next day. With 18'' you HAVE to run a very thin tire, which means you feel alot more and those rims will bend easier than any other size. I gaurentee the 18'' will rub. My civic had major rubbing issues, and my gsr with 17'' rubbed only in some places, but pretty rare. You can totally feel the loss of power. I was really happy when i finally got my 16'' rotas in and ditched the 17''. The car rolled easier from a stop (less gas to get moving), accelleration felt better, and i could run a little thicker tire. Plus the look was 1000000000x's better. From now on i will never run larger than 16'' rims, on my civic i may even just opt for some nice 15'' rotas.