Wouldn't you get the same thing you already have? This is just my opinion, but when I test rode an Aprilia Factory, the low bars made it very difficult to shift my upper-body weight. Actually, it was pretty much impossible. An upright riding position doesn't look as cool, but it makes it much easier for me to throw my bikes around.
Spiegler sells a very expensive handlebar kit for your bike:
http://www.spieglerusa.com/cfm/sbk.cfm. But if you like to be comfortable when you ride, and you live where there are lots of curves, it would be worth it.