If you're looking to buy a knife look at Cuda knives. They have a nice big non slip grip, and stay super sharp. They make different knives for different uses but here is an example of one.
http://www.basspro.com/Cuda-6-Titanium-Bonded-Breaking-Knife/product/1602221115/
http://www.basspro.com/Cuda-6-Titanium-Bonded-Breaking-Knife/product/1602221115/