I've recently (the last ~2 months or so) been using Mozilla - and in my opinion, it is MUCH better than IE. Its only flaws: Its not finished so it does have some problems (invalid script bugs and what not), and certain web pages that launch games (WWII Online and There come to mind) wont work from it, and the most frustrating part - its a PITA to get any plug-ins to work.

Just my .02