This is going to sound rude but it is not intended that way. Archery manufacturers love people that think the way you are. If your not shooting 330fps you shouldnt be hunting(what a load of feces). I routinely shoot through deer elk and bear @ 190fps from my recurve, about the same or less from my longbow.
Can you put an arrow where you want it with your current set up?
Are you confident shooting this bow?
If you feel that spending the extra money is in your budget then go ahead but dont do it for the reason that your current bow is inadequate.