Hi Morris,
Do you have anything other than Lowmax right now. (I love Lowmax, too, by the way). I don't have HSTA, but it sounds like I should get it (it sounds like what you have could be used as a highstep for that workout). I would also highly recommend Kick, Punch, and Crunch for cardio, and the imaxes (I have 2 and 3--3 is so hard it is fantastic!!!!). ALSO, I absolutely love Hardcore Extreme--it has two interval cardio workouts, and 1 circuit workout--all three are super intense (I think you need the bands for just one of the three workouts on this DVD, and I am sure you could substitue dumbbells for the bands if you don't have them).
Do you have bootcamp? I would recommend bootcamp and circuit max for total body strngth workouts with cardio.
Did you also want a recommendation for a total body weight tape that doesn't have cardio? Muscle Endurance is fantastic, and it on the DVD with Bootcamp, so that might be a perfect choice for you!
Goodluck!!
Dukechick