By the way, if you do choose the ATI card, you can use ATITool
http://www.techpowerup.com/atitool/ to squeeze a bit more performance
out of that 9600. Here's some info from ATITool:
ATITool is an overclocking utility designed for ATI video cards.
Design target is to write a light-weight application for the enthusiast
- so no questionable registry tweaks. Sorry.
Main Features
* No limits overclocking.
* Finding maximum core and memory overclock by rendering into a
Direct3D window and scanning the output for visual artifacts.
* Temperature monitoring and fan speed control (on supported cards)
* Removal of Catalyst overclocking lock for 9000/9200/9550/9600
series.
* Artifact scanning mode for non-ATI cards - use together with a
3rd party overclocking utility.
* Loading a predefined clock profile on Application/Windows
startup.
* Hotkeys that can be used any time to load clocks from a profile.
* 3D application detection (Direct3D 8, Direct3D 9, OpenGL) to
overclock your video card only when required.
* Gamma control
ATITool will only work on Windows 2000/XP/2003 (64 bit versions are
supported).