My brother is looking into getting a Buell Firebolt and wanted my input, so I went along with him to the dealership. Because they're part of Harley (well, not technically, but close) they fall under the same insurance policy, and that means that they'll let you test-ride a new bike just by filling out a "I know it's dangerous, i won't sue you" form and letting them make a copy of your driver's license. They had two models, the XB9R and the XB12R - I rode the 12, my brother rode the 9. Let me tell you... TORQUE. Torque like there's no tomorrow, torque like an easy wheelie (controlled, mind you) shifting into 3rd gear at 45-50mph! It was a blast to ride, comfortable, cool looking, really great.. mostly. The thing vibrated way more than my EX, and for all of the hype about how nimble the bike is, it's a pig compared to a 500R. You have to push the bars quite a bit on the XB while the 500 is practically begging you to tilt it over and drag your knee. My overall feeling is that both are pretty good street bikes (the Buell is really stable) but in a straight line I'd want the Buell, curves I want the 500R. Surprising, really, you figure the radical frame design plus the extra 700ccs would make up for it, but they don't - it's just way different. Makes me appreciate my little EX a lot more though!