Use what ever program you like and can affort. As long as you can save your model as an obj-file you do ok. I have several modeling programs (Max, Rhino, TrueSpace etc) but nearly all of the time I use my little Cararra...because I like it. Do not run out and use a h... of a lot of money...its the person using the program that counts. You can get free modeling tools too or pick up some from magazine cover CDs. And if you have not yet tryed to model be prepered for a big satisfaction when you have made your own props or clothes...its so nice to see a pic containing your own stuff.