I found the grip to be quite comfortable, comparable to a standard .45 1911 frame from Springfield Armory. Just wide enough to get a solid grip on for offhand shooting, but not so wide as to throw off my grip entirely. Try taking off the rubber grips, and see if it fits better. If so, get some lexan grips from SPD or the like. If you're feeling a bit adventurous, I suppose you could get a bit of plexi and make your own clear/dyed ones.
.43 cal balls are about $15 for 500, sometimes you can find them for cheaper. Based on the quality of the paint, I think they're equivocal to standard paint pricing (based on $60/case for the good stuff).