that being said, why not err on the side of having slightly more power than slightly less power? if you plan to make this an investment to last until the thing dies, why not buy one slighlty higher on the ladder? obviously, if one is on a tight budget, then my advice does not make sense. but, if you are in a position to treat yourself to something nice and still have plenty of cushion for more necessary financial commitments, then by all means.....