Jimmy, moving the seat around will affect the overall trim (bow/stern) of the boat. If you typically paddle with no gear in the back of your boat, having it centered or slightly back is alright, as long as you aren't sinking the stern. Get a friend to have a look at you while you in your boat in a pool, lake or whatever and see how it floats with the seat position you have now, then based on what they see adjust the seat forward or back to level out the boat.
Like Chase mentioned before, having the seat forward slightly or all the way, will allow you to be able to drive the Mamba because of the new edge profile, vs. just paddling and reacting to what the boat does.
Also having seen the boat in action (Chase's specifically) it is not only fast, but picks up where the old Mamba was lacking. It will be a good boat for progressing with in the Northeast/New England area.