Easy...Cold Steel Master Hunter. It is the only hunting knife I've used for the last 24 years. It has gutted every deer and antelope I've killed. It has been sharpened so many times now that my buddies refer to it as the 'sharp stick.' It has many more years of service before I consider replacing it. And when I do replace it, I will find another Cold Steel Master Hunter.
The current version in production is stainless steel:
Master Hunter - Cold Steel Knives
It has been made in other steels as well. Mine was one of the original versions in Carbon V. They are all good.
Search for it on ebay and you will find many for sale at much less than 'retail.'
My brother has the version with the gut hook. We both agree that the gut hook is unnecessary and not very useful.