k here's the deal.
According to what you want, you don't need the Macbook Pro. You could get away with the Macbook alone with room to spare. Will you be using Final Cut because if you're just basic editing you can also get by well with iMovie HD (comes with the computer). Space wise, they come with 60 or 80 and I think you can get 100 GB hard drives if you want/plan to store a lot of movies on it.
Also, the refurbished ones are almost always just as good as the new ones. All they are are the computers that people returned for some reason or another (wanted to upgrade, needed the money), and Apple takes them apart, and completely cleans and fixes any problems they have, and then re-assembles them and puts them back on the shelf. It just means they aren't 'brand new' anymore. It all depends if you want the satisfaction that it is still in the box never been opened, or if you really don't mind. It's all up to you though.
Any more questions just pm me.