Hi, in response to you floor aerobics video question, I agree with the first person, collagevideo.com is a great resource, you can read other peoples reviews of the tapes before purchasing, often they just tell you, "don't waste the money!" or "great buy" which gives you some insight.
I do both step and floor, so my personal floor recommendations are:
#1 Crunch:Master Class Aerobics {you won't have more fun doing aerobics than when you do this video! I LOVE this workout, the instructor is a hoot! he's having a ball with the workout and before you know it an hour has passed and you are drenched in sweat (or at least I am!)}
#2 Kathy Smith's Kickboxing Workout is a good floor workout as well, from warm up to cool down stretch is 45min. Sounds short, but a good workout in a short time and you can modify your intensity level to suit the workout.
Sorry I don't have more, but the rest of my stuff is step! Happy shopping!