Should I get the supersets + push/pull dvd, the slow and heavy dvd, or the pyramid upper/lower body dvd? I want THEM ALL, but can only buy one at a time. I already have MM, MIS, PS, PH, B&G & DM... I like to rotate weight workouts every 4 weeks to stay challenged and fresh. But I can't decide which to add to my collection! Thanks for you help.