I have the Gerbing gloves, powered from the bike. I don't commute so can't comment about wear and tear etc, but having used them from time to time I would go for gloves over heated grips every time. The great thing about gloves is that unlike heated grips they heat the back of your hand and fingers as well. I won mine in a competition, otherwise I wouldn't have spent £140 on them for the little use they get either. One thing Gerbing told me was that wiring to the bike was better, as they get lots of customers complaining their battery-powered gloves don't work because they haven't conditioned the batteries over the spring/summer/autumn months. So they pull them on in December and the batteries are knackered. Just worth mentioning.