I am looking for suggestions as to which DVDs to purchase-- for both aerobics and strength training. I am an intermediate-level exerciser with some experience in weight training who has never tried any of Cathe's workouts. I enjoy aerobic tapes such as Kari Anderson's Sweat Express (floor) and Two the Max (step & floor). While I like complex choreography, it takes me a while to catch on. The main tape I have used for strength training so far is Firm Cardio, where I have been using 10 & 12 lb. dumbbells. I notice many of Cathe's strength tapes require a barbell-- I haven't got the first idea of how to purchase one or what I would need. Any advice would be greatly appreciated!