just to add to your list...
Papst, Delta Electronics, Oriental Motors (Orix), etc.
It all depends on what you are trying to accomplish.
Sound and air moving ability vary on all makes and models.
<A HREF="http://forumz.tomshardware.com/community/modules.php?name=Forums&file=viewtopic&p=28752#28752" target="_new">THGC meeting? Would you go if there was one?</A>