I am running - Oxford Heated Premium Hot Grips - Sports - had them on my CRF just fitting to 690 enduro, can't really fault them - quick to temp and bags of power. Had them wired like Steve mentioned, but prefer them on a switched spur personally.
Would certainly buy again. On the downside is I find they feel a bit thicker than normal grips, although after measuring they are pretty much identical in diameter so must just be the feel of them.
Shop around as they are usually on special (see sports bike shop).