Hi, klfb2, and thanks for your kind words!
I think it's a full rotation you're after rather than mish-moshes of strength DVDs. If it's real mass-building you're after (and it's mass coupled with reduced fat stores that creates the "super toned up" look), here's my suggested schedule:
Week 1:
Slow And Heavy; one complete strength workout on non-consecutive days, getting in at least 4 hour-long cardio sessions in addition to that; at least one complete rest day and at least 4 total ab sessions (your choice for additional abs)
Week 2:
Gym Styles Series; one complete strength workout on non-consecutive days, getting in at least 4 hour long cardio sessions in addition to that; at least one complete rest day and at least 4 total ab sessions
Week 3:
Muscle Max, Push-Pull and Supersets workouts performed as originally produced on non-consecutive days, getting in at least 4 hour long cardio sessions in addition to that; rest day and abs as noted above
Week 4:
Pure Strength Series; one complete strength wokout on non-consecutive days, getting in at least 4 hour long cardio sessions in addition to that; rest day and abs as noted above
Week 5:
Pyramid Upper Body and Pyramid Lower Body on non-consecutive days, cardio as noted previously; rest day and abs as noted above
Week 6:
Circuit Max
HSTA
Hard Core Extreme circuit workout
Terminator's Gauntlet or Viper (your choice)
Boot Camp as produced
Two rest days; at least 4 ab sessions (Boot Camp included)
What I've tried to do is go hard on the split-set, true strength and mass workouts and then balancing with endurance-oriented workouts like MM, PP/SS etc., and then even more endurancey with a week of circuit-style workouts to give the muscles a real chance to breathe and build. Split-set training offers the most benefits when your goal is absolute strength and mass. Make sure to keep your cardio varied (in terms of type and impact) AND intense.
Check how you feel after week 6; you may be ready for an ultra-light week or indeed a week off. If you're rarin' to go again, start all over again with S/H week.
HTH - let me know what you think.
A-Jock