Take a look at the Lee Valley (www.leevalley.com) hacking knife. I have not used one, but am a very satisfied customer. This knife is designed for those things you shouldn't do with a knife. They also make a very nice Batonning Chisel that I have. The handle is not as long, but it is great for uses where you don't want to use your good chisel or knife.

Respectfully,

Jerry