You really should think about Switching To Mozilla.
Mozilla really beats the pants off of Internet Explorer in all aspects except for speed in certain cases as far as I can tell. Tabbed browsing is amazing (it lets you keep related things or themes linked by windows - example: you are surfing cnn in one set of tabs, and another windows has 5 tabs of movie news). One big caveat of tabbed browsing is that if you are a bit twitchy on the mouse (I wail on everything, keyboards and mice don't have a very long life in my hands) you can close a window full of tabs before realizing you only wanted to close one of the tabs. It warns you before you do it, but I click first and think later.
Anyway, when you have used tabbed browsing, it is hard to go back.
But tabbed browsing isn't the only good thing about mozilla, you also get bayesing filtering on your POP3 email (you mark what you think is spam, and it statistically gets better at recognizing spam for you), *built-in* pop-up blocking, Google search built in, and more. Read the article, as they say if you try it and don't like it, Internet Explorer isn't going anywhere soon.