Yo. I have a project for university going on, and so far I have been using the universities own equipment to do my work in Maya.. however, I'm now away for a few months using my own PC, and right now its quite difficult to work with my current setup. I've created a 3d charecter, however even with the Smooth algorythm disabled, its still laggy. Pritty much anything I've made in Maya that is'nt a cube right now is quite laggy.

Right now, I'm using a Radeon 9550, on a AMD Sempron 2800+ PC with 1gb RAM.

I was considering getting myself one of the following graphics cards:
- GeForce 6200
- GeForce FX5500
- Radeon x1300

But now I think of it, I might need a new processor or something. I have no idea on the technical side, but I've been needing an upgrade for a while now. What would you recommend?