If you don't play games, and just use this for movies or pictures, find the most recent AGP video card you can. The might mean you need to switch to ATI/AMD, as they have many more recent AGP cards then Nvidia. If you can, try to get a (Nvidia) 7300/7100, or a (AMD) 2xxx/3xxxx.
These newer cards might require a bit more power then your older 250W can output. Consider getting a cheap ~$45 video card, along with a quality $60 PSU. You don't need anything high end, a 380-500W PSU is fine. (Antec, PCP&C, SeaSonic, FSP, etc.)
any cheaper cards that I could go with and not have to upgrade the power ?