I'm in the same boat that you are. I rode to work the past two days with the temps in the high 20's, and after 30 minutes, the tips of my fingers were numb. I spoke with a dealer who rides year round, and his preference was heated grips. I think I'm gonna buy a pair just to see how they do. I hate the idea of heated gloves being attached to the bike. I'm so scatter brained, I would rip the cord out the first time I used them.
That is unless I can find out where Tigger got the hand warmers in his pic. I don't know how they would look on the bike, but I'm willing to try