07 XL7 Tire Size question

[SenseiBuddy]

I just bought the new 2007 XL7 and so far I really like it. ( a week old)
but I see way too much fender space between the top of the tire and the bottom of the wheel well... i guess im just picky, but id like to close it in a bit.
My Luxury model came with 235/60-17 tires and wheels..
without changing wheel size, whats an alternative tire size that will keep a performace type function and close in that gap i hate..

thanks in advace for your insight..

bud