If you ever do decide to switch out bars, would moustache bars help with your arm/hand issues? Lots of usable space for hand positions. You might have to do some monkeying with levers and shifters and clamp sizes, though...

Well, maybe I didn't have such a good idea. But I really like my Nashbar steel moustache bars. They're a little narrower than standard moustache bars. Very comfy.