Go with what makes sense for you and your use - I am a huge fan of Boye knives as their edge and blades seem to hold better than the others that I keep on board. Boye Knives Cobalt Blade Boat Knife - Rigging & Sailing Yacht Knife
We keep the marlinspike with sheepsfoot end attached to all our PFD's (which are worn when on deck/in cockpit at sea) and use Cobalt 3's for galley work and general sheath knife applications. That being said - pointed knives make me nervous on deck in a sea. Good luck.