I have a Wyoming knife for starters. You can't beat it for gutting and skinning an animal in one knife. I used one two years ago on a bear and was astonished at how good it was. Check them out at http://www.wyomingknife.com/knives.htm
Mine is the second (original) model shown. That top one is on steroids but I bet it works great.

Happy and Safe Hunting
Reid