I have four browsers on my computer but I've used IE as my primary browser for years, not anymore. This past week I revisited Google Chrome and wow, what a difference. The browser loads considerably faster especially when used with iGoogle Desktop and Google gadgets, tools and apps. Passwords are stored much more efficiently and I never have to re-enter things like Ido on IE. Chrome is clean, fast and easy to use. I recommend it! My second choice is Safari for Windows. I like the clean, bold style, but it doesn't work well with my webmail, so it is impossibly to fully implement.
Third choice, Firefox. I love Firefox, but the constant updates feel like too much of an annoyance and I find that I'd rather just not open Firefox, than have to hear all about how many updates I need to download.
And then there is IE. Gotta have it because no matter how much I hate Microsoft products, IE is still by far the most used web browser out there.