Don't forget to look for the Buell XB12's. Personally, I think the XB12's are better because they don't run a shorter stroke like the XB9's, they end up being easier to upgrade to 1250cc or 1450cc. Bumping the bike up to 1450cc will get you up to 130hp or so but would require splitting the cases and having them bored to accept the larger jugs. Sounds difficult but really isn't that bad. Just be ready to open your wallet REALLY wide for this upgrade.

Maybe think about checking out the HD XR1200's as well. They don't look as much like a crotch rocket but they do handle well and can keep up with the crotch rockets in the twisties. I have thrown a few sport bike riders off their guard while riding through some of the back roads. You can usually find them at a pretty decent price. The 2009/10 XR's have an OK suspension. Many XR owners upgrade using Ohlins components. 2011/12 XR1200x have the upgraded Showa Adjustable Big Piston Forks(BPF) with adjustable piggyback reservoir shocks on the back. I personally have been pleased with them and I'm an agressive rider. Pricing typically ranges from 6k for a 2009 up to 12+k for a new 2012.