Regarding exercises you do get a slight increase of 5 more exercises on the bowflex xtreme 2se. Yea rejuvenator is the way to go you can rotate the rods but it increases their fracture chances bowflex will directly tell you not to rotate them but to replace them. As mentioned in the review of the bowflex xceed home gym the upgrade kits come in the form of a 310 lbs or 410 lbs power rod kit.