It depends on your goals.
I would first take a recovery week: moderate workouts, or focus on core or functional/stability workouts, stretching, etc., especially after an S&H rotation. This will give your body a much-needed recovery period to make more gains.
Then, if your goal is to get leaner or increase indurance, do a more cardio-based rotation.
If you still want to work on building strength and muscle, then you can go to another rotation using another set of workouts (PS, SH, GS--whatever you didn't use the last 4 weeks).
Or you could do a rotation that blends a lot of different modes of working out, to get a little of everthing and have some fun! I did the following rotation in January, which worked well for my goals at the time (getting off those last stubborn 2 pounds to my goal weight, maintaining muscle mass and working on my booty!):
Day 1: interval cardio (you could use an IMAX for this, whichh I intended to do at least some weeks, but I got so much into Cardio Coach that I used it during the whole rotation!)
Day 2: short cardio and full-body weight workout (or I used TLT's here)
Day 3: cardio (kickboxing for me)
Day 4: short cardio and lower body weight workout (I used Firm here, because nobody works my booty better, and I was having a love affair with my new BSS4 system and the Transfirmer)
Day 5: yoga/stretch
Day 6: short cardio and upper body weight workout (heavy)
Day 7: core and stretch
A rotation doesn't have to be 4 weeks. Some can be shorter or longer. But the more advanced (experienced) you are with weight training, the sooner your body adapts to the new stresses put on it (from new exercises, sequences of exercises, rep patterns, weights, etc. ) and the sooner you will plateau when doing the same routine.
Some very advanced body builders never do the exact same workout twice in a row, to always keep their body guessing somewhat. And the changes can be small, like the angle of an incline bench press, or the tempo of the move, or the sequence of the moves.
