Your biggest issue will be the one-shot lens.
The Canon Rebel XT 350D is a very adequate camera and needs only to be mated with a good fisheye lens like the Sigma 8mm f/3.5 Circular Fisheye or Sigma 10mm f/2.8 Full Frame Fisheye.
Mount this on top of a Nodal Ninja 3 MKII or Agnos MrotatorUM and set the correct camera/lens position to rotate around the NPP (Non Parallax Point) and your in business.
There are of course many options for camera bodies and lenses but in the main they are do similar jobs.
Tell us what you really want to achieve and how much money you wish to part with and I'm sure we can come up with a good selection for your to choose from.