If I were to put on 15" rims do I need the relocation bracket? GT500wifey #needmoreboost

Wanted to know anyone's suggestions on upgrades / modifications I should do to my 07 GT500.

OMG DON'T YOU LOVE THIS CAR!? I DO, I DO, I DO!!! It's amazing, but a little pricey, don'tcha think? Yeah, well, I'm eventually going to accumulate enough money/parts to trick out a Mustang GT, turn it into a 350. Send me any links to pictures you have if you have any. Thanks.

Here's a detailed review on the 2007 Shelby GT500, on TopSpeed. It contains lots of information on features design. Also the article packs a few presentation and driving videos, and also contains a load of pictures (most of them can be used as wallpapers), so, enjoy! It's a bit of a long read...