Don...your opinion.. please..since you have owned the the 3X and 4x do you feel that the 4x is a big improvement and way superior to the 3x and worth the extra money? I have found good prices for the 3x several hundreds less and wondering if I would kick myself for not waiting to get a 4x when I might better afford one.?? tried to PM you with this question , just not sure how pm works.