Need Rim/Suspension advice please!!

I am looking to get new Rims, I want to go with a set of nice, light racing rims, I have heard good things about Modegi (sp?). Here's the problem. I have a 96 Civic EX and have put 2 1/4" Exhaust pipes on it so I already don't have enough room when there are more then 2 people in the car. So I guess I am stuck to not getting Rims any bigger then 15". Is that bout right? I don't want the big rims, just nice, light and a good ride. So the meat is, do I need any kits or anything, should I stay with a 15" wheel? And any ideas on what tyupe of "racing" wheel to go with? Thanks for your help fellas, this is for sure NOT my area of knowledge.

JT