ie is trying to improve.. Though it needs a rewrite.. like they did when they try to unseat netscape, netscape made a critical mistake by sticking with their legacy codebase..
i use opera on my laptop, firefox on my family computer, i like both, though, given the choice, i choose opera (thus so on my personal computer).. As i feel firefox still got a few kinks to work out.. Just personal annoyances, nothing major.