If you're going to do this, make sure it's NOT the 9600SE.
I recently went from a Ti200 to a 9600SE, and I was disappointed with the performance. I took it back a week later and I'm back to the Ti200.
The problem is that the 9600SE is a handicapped version of the 9600, it has a 64-bit memory pipeline as opposed to the 128 bit pipeline of the normal 9600, or the 9600 Pro. Because of this, the performance I was getting wasn't really much better than the Ti200.
So when upgrading, make sure it's not an SE.