Believe me, YOU DON'T WANT TO WATCH DRAGON BALL GT. It's the worst thing that could have happened to the series. Firstly, it was not made by Toriyama (he just helped at the beginning) but was made by some idiot who bought the rights to continue the series wwith whatever he had in his stupid mind. Secondly, it just sucks. DON'T WATCH IT! You'll waste your time and money, perhaps. But watch the ending though. Is the only good thing it has.
Both Dragon Ball and Dragon Ball Z rule. Some of my favorite animes of all times, I just love them ^_^
P.S. Fox's movie is going to suck royally, guys. Or at least that thing will certainly not be DBZ. Just somethign using the name of the anime. Just think of "Street Fighter live action movie" it is really going to be sad.