Anything is better than IE, Ie pretty much trust all the websites you visit and lets them install anything they want with active X plug ins. I use FF, but it can get heavy on the ram if you have a lot of tabs or windows open. Google chrome is worth considering too, I think its slightly lighter on the ram than FF,
You Might want to look at opera as well. But imo the user interface is the most important thing, which is quite subjective, but if you like IE's interface you will probably like FF just as much if not more.