Advice needed for Video Card

Looking for some advice... I built my PC about 3 years ago and AFAIC, it
still has some (halfway decent) life in it. I still plan on building
another PC next year but would like to experience the Aero capabilities of
Windows Vista now with RC1. Considering that I want to use the new video
card in a system I build next year, what should I look for as I begin
shopping for a video card. I do very little gaming and less photo editing
than I use to.

The main components are;

* MSI KT266A Motherboard
- supports up to 3GB of DDR SDRAM
- 4x AGP Video slot

* Athlon AMD XP 1900+ (1.60 GHz)
* 768MB PC2100 DDR RAM
* NVIDIA GForce2 Ti


Thanks,
David