Do i have to use pictures of
cars to make it
clear to you? I'm not being mean or anything but if you would just think like a normal person you could obviously guess that something that costs that much more is also that much better.
So no, don't buy the 30 dollar one, buy one from at least 120 dollars or up. If you really like graphics buy one from 200-300 and if you are a fanatic buy one from 300-1000 (yes thousand =p) There won't be that much difference anymore though (compared to cheaper ones) with high-end performance cards that cost over 300, although the 690 GTX costing 1000 dollars/euros beats everything that is cheaper. (That thing runs battlefield 3 on ultra at 120 fps)