AHH, far too many trolls.
They are both good browsers but both have their ups and downs. When it comes down to it, it is decided by personal opinon and consequently your own choice. For example i have nothing against IE, i think it's a good browser but yes it does have some insecurities. Having said that if you use a good anti virus and firewall like me you will never have any problems.
I use firefox because i prefer it, to me...it feels more stable and responds quicker, i also like the idea of it being open source and customizable but not all require this in a browser.
As for http//ie7.com, i saw that a few months back...i am surprised it has not been taken down or at least challenged by Microsoft if i I'm honest.