I used to Blend on that graphics card. I has good openGL and works well, but with only 32 MB vram you’d be very limited in how complex a scene you can work with.
Any Nvidia is the safest bet, but try to get one with at least 256 MB vram. Do you have a PCI-E slot, or just a PCI ?
I didn’t actually know, but I mention it as something to keep in mind when buying a video card.
There are some pretty good video cards for pci, Nv 7300 GT is available in pci. Maybe even the 8x and 9x series. No need to spend a great deal of money though. The big chips are focused on frame rates while gaming, and you’d really want PCI-E for that. Blender doesn’t need that much speed, but lots of Vram means lots of verticies at one time.
The GeForce 4 series is junk compared to the 7x series even, it’s a very old generation and since you use the BGE will not be able to handle scenes with much complexity in GLSL mode.
I have an 8800 GT and it has served me well. I’d try for a GTX 295 or GTX 280 if possible (because the GTX400 series would be like having a powerful space-heater in your computer)