It sounds like you would like Leaner Legs, which is fast paced, lighter weight, multi reps and a total energy charge workout: I love it. And round out your weight training program with CTX Upper body, alternate these two for a great and complete routine that will define without bulk. The Leaner legs will increase your legs' endurance power on all cardio workouts too.
Also, you sound like you would like to do cardio that blends weighted exercises that specifically target the legs in with the workout: think about Boot Camp for you, Kick Box (especially kicking drills, either Cathe's "Cardio Kicks" or perhaps "Powerstrike"), and cardio routines that work the lower body through plyometrics, such as interval workouts, and Circuit Max (but instead of the upper body wright work, you could some days just grab the barbell and pump out 2 mins of squats, lunges, etc instead, make it work for those long, lean leg muscles and glutes). Try Cathe's Cardio & Weights from the I-series for upper body circuit work, where the weight load is moderate but fast paced again.
The new "supersets" also sounds like it was custom made for you: have you pre-ordered it yet from the soon-to-be-released Body Blast series?!?!?! What are you waiting for?!!! Credit cards at the ready now......
Hope this helps some
Clare