At my school they use IE 6, one the one I mainly used last year I downloaded Opera onto it because I cant stand IE6. I have downloaded IE8 on our family's computer, but I still prefer Opera reccomended Opera to my friend and he loves it. I have used Crome and it the GUI is really small so it is easy to focus on your work, which is a good think as I have ADHD, but it doesn't work too well with Flash so I'll probabally use Chrome as my default browser when they take it out of beta and the bugs are fixed.