Powerblocks...you can buy add-ons to get up to 150 lbs I believe. Bowflex only go up to 90 lbs...and if you want higher in Bowflex you have to wait for them to make another set, then buy a whole new set. Bowflex are expensive relatively speaking, everytime you want to move up to another bracket of weight, it is a new set of dumbells. THey make Bowflex in the up to 55 lb, then a set up to 90 lbs, but they are separate sets of DB's thus costing well over a grand. And then if you wanted over 90 lb, Bowflex still has to manufacture a set going over 90 lb, then you again have to purchase another whole set of DB's, thus $500-700 more. Pretty pricey in the long run, almost defeating the purpose of consolidating the amount of DB's to save money and such.