Nautilus and Bowflex have teamed up to create the “gold standard” in the category. I’m always hesitant to anoint anything “perfect”, but the look, feel, and weight distribution evenness of the engineering make the Select-Tech 550 close. What really sets the 550 apart is the tighter ranges of the lower weight settings: the 2.5 lb. increments up to 25 lbs. and the 5 lb. increments up to 50 lbs., truly yields an all-in-one product for everyone.