You have to be able to get them in New Zealand

Your mission, should you choose to accept it, is to help me decide whether I should get a workout DVD at all, and then which out of the 20 million is going to give me the best results.
I was just thinking about it today. On days when i work i find it hard to get to the gym. I work fridays at the moment, from 12-2, i know that sounds like very little, but to get to work I have to leave my house at 10:40, and i would prob get home around 4pm. Im not a morning person xD and if i went to the gym after work i wouldnt get home until around 5 or 5:30. And then i have my martial art training from 6:30 (which keeps things ticking over but isnt fitness/fat loss focused). So i was thinking, a workout DVD on fridays would help.
After easter i will be working a whole lot more too, so on the other days when i have training in the evenings I could do a DVD in the morning before work. I mostly have the house to myself during the day, and Im hoping people will leave the house earlier than I will have to.
Basically, i want a DVD that doesnt require me to buy fitness equipment. I also need to be able to find it on
www.mightyape.co.nz (the site doesnt have the 30 day shred

)
At the moment i am looking considering:
Aussie Fit - Body Trim
Aussie Fit - Fat Burner
Aussie Fit - New Body (Plus Dance Aerobics)
Fat Burning Workout For Dummies
Aussie Fit - Ultimate Workout
Also, when you guys use DVDs at home, do you use a matt or anything? Im sort of worried about sweating into my carpet xD With the more energetic ones do you have to be careful not to smash into your tv/knock it over with your bouncing around? Do you wear shoes?