I would check out those links above but another thing to note is that not all cases are created equal, nor are all cases built for one specefic purpose. For example, an Antec 800 series case is great but with all of those fans it's a bit loud. IF you want something smaller just remember that a small case can be a rreal pain to work around in. I prefer the Antec Cases because they aren't too big and they aren't too small and come loaded with an Anctec powersupply and two or more fans which is optimal if you are running an Athlon.
Just my two cents.