Definately go with the X1950 Pro.
It's an awesome card. The AGP version is the fastest card you can buy to keep an aging AGP slot board good for another year.
I bought mine from NewEgg pretty cheap a few months ago; best card I've ever had. I play SH4 with everything cranked to max at 1680x1050, runs great and I'm only 2.4 ghz with 1 G ram.
I've actually heard bad things about the 1600 series, and they're definately no comparison to the X1950.
__________________
|