I've run Oxford on two bikes, and they perform very well and are cheap. I have this model:
http://www.amazon.com/Oxford-OF697Z-Heaterz-Cruisers-Handlebar/dp/B0033AM3Y0Nothing fancy, look is very stock. Oxford has some newer models that look a bit more plain, but have a "smart" controller that connects direct to the battery, and will auto turn off if left on with bike off. Don't know if I would trust that feature. The grips above come with a really cheesy controller, that I immediately replaced with a HeaTroller mounted in the fairing. The controller is the only bad part of the kit. I have heated grips on everything except the DRZ-400S, and always will! I'm sure heated gloves are better, but the grips are always there.