I read a lot of posts of people getting a new DSLR and then equipping it with all the latest and greatest stuff. The Rebel XT is a great camera for lots of reasons and one of which is it's small size. When you add all this stuff to the camera you end up spending enough that you could have bought a 20D or perhaps a 30D. If this is a new camera for you, jsut get the camera and learn to use it. Then as you grow, so can your camera.
Just my 2 cents, I guess that's about all it's worth.