Its ever changing isn't it. And its some what of a madness only limited by your credit card limit
I like the shortie can, that's a 2-1? I bet its pretty loud! Since your in it, scoop up a carbon airbox(or glass), they really open up the whole range with attention to the mid range. I'd also suggest suspension changes to the rear, a link and anything but the stocker...you can make the bike turn in WAY better than stock.
Good luck!