I thought about it and decided that Hot Grips are probably the best option for the type of riding I do...
As for fitting Oxfords....the definitive answer is YES...it can be done.
Its a simple matter of leaving off the OEM plastic grip tube on the clutch side which gives a conventional 22mm diameter bar.
The throttle side is a bit more tricky....the plastic throttle sleeve is conventional 26mm diameter bit has a lot of mouldings on it that need to be removed (see photo)
I was lucky in that I fitted my own Triumph grips after I bought the bike, so still had the originals to modify. If your bike came with heated grips fitted then you may not have been given the redundant non heated throttle grip.
The throttle grip is quite a tight fit so needs to be aligned correctly before fitting as I doubt it'll come off again without damaging either the grip or the inner tube.
I fitted the throttle grip with the tube off the bike as I didn't want to put any strain on the RBW unit.
I used superglue to attach clutch side and strong hairspray throttle side as I didn't want the glue gripping with the grip half on...a rubber faced mallet and a hard rubber pad under the inner end of the tube saw the throttle grip safely attached.