Vid card question

[Deadlock]

Bair with me, i dont completely know what im talking about here.

Basically I have a 32mb radeon vid card that im using to run planetside... its time to upgrade.

What would u all suggest i upgrade too (give a few suggest as currently im not made of money)? The 128's are what i have my eye on, any reason to try and go higher?

Also, is there any types of specifications that would keep my computer from running any radeon product? Like do i need to be watching the type of ram it works with and such?

thanks in advance, u guys already helped me with my memory a while back and did a great job, so i know u wont let me down.