What are good graphic cards for X, low-end and high-end

[Erich Dollansky]

Hi,

I am currently planning a new computer. I have check the wiki but I
also would like to get real-life experience here. I have not decided
yet of I should get a cheap card just for software development and
watching videos or a good card also usable for processing videos.

What cards do you use for these purposes?

Thanks!

Erich