2.5 to 3.5 will work great. Lots of great knives out there from cheap to $$$$$, whatever floats your boat will get the job done. The Havalon works very well, is cheap, fast and easy to replace blades, and has no soul so if you should lose it no big deal. Leave a $$$$$ knife in the field and you might be making another trip back in, leave a Havalon and you'll be in your bed dreaming about your hunt you had. With that said there is nothing like fine custom made knives.
