In my opinion the best is the KTM. However, whoever said that they require a bit more maintenance is correct.

I'm actually in the market as well although I'm going used. I'm going to go with either the Yamaha, KTM, or Honda. All are incredible bikes. What I buy will probably be determined by age, hours, shape, and price. I haven't ridden the Kawasaki but I'd wager it's also solid.