I got my Storm (w/ TORs dealer installed) in October. Since then, I've thrown the chrome caliper covers on the front brakes, installed titanium exhaust wraps, replaced the embellisher with a blank clutch cover, and have chrome levers. It's gorgeous.
As far as performance goes, past the air filter, it's pretty much on you. I'm a student at MMI, and within 5 years I plan on bolting on a turbo/supercharger. There isn't much available to improve upon.