Just ordered the Akrapovic slip ons for mine in titanium with CF end caps--takes the RWHP from 125 to 132 and drops 11 pounds. Not supposed to be any difference in sound (with the removeable sound baffles installed). Sorry, but the stock cans are just too ugly--not a big fan of that MotoGP look.
Here's another 'feature' of the stock cans. The fronts of mine are all beat up from my heals hitting them. I put aftermarket slip-ons on my winter mod list along with brake pads, brake lines, a better seat, etc.