60 FPS is NOT okay for Freelancer. Well, maybe if you are used to it. But seriously, the mouse lag is horrible with 60 FPS. It's probably the way this game handles the mouse pointer. With 60 FPS, it feels like the mouse is on ice, "sliding" over the target.
And I don't know how high FPS will make your ship "buzzle"...unless you can prove how the netcode of this game correlates to the FPS.