I got FireFox too. It's at least as fast as IE, which Netscape wasn't. Also, I like the way their "Find" feature works.
Using Opera for 3 years now.
Allegedly the fastest browser out there (PC World Best Browser 2004), and tons of useful features. I find Mozilla and Firefox too skimpy for my needs.
There's a free version and a pay version for $39.00. The free version shows an ad banner in the toolbar, otherwise identical.
http://www.opera.com