I would highly recommend going with 13 inch wheels...if you're in a class that allows such small wheels. Race tires for that size are cheaper and available in a larger variety of sizes. I have 15 inch race wheels from
www.diamondracingwheels.com They are light weight (mine weigh 19 lbs each at 15X8) and they are available in just about any bolt pattern you want. They're also dirt cheap at about 60 bucks a piece.
Nick