I am trying to decide which to buy next. SJP/Step Blast or Imax 2/Cardio &weights. I have Imax 1 and 3 and love them. Which circuit workout do people prefer Step, jump, pump or cardio & weights. And do I need another Imax. Any input would help. I know eventually I hope to own all her dvds. But, I'm trying to keep myself in check, especially since I preordered the new series. Thanks for any input. Mary