What's so great about non-IE browsers other than "speed"?
SPEED!
Opera and Chrome are the fastest.
Better security than IE.
I like Opera for some extra features like:
1 Built in bit torrent client that works very well. Got a rare hard to find 24 song CD yesterday in < 4 minutes using it.
2 Built in translator feature accessed by simply right clicking the word, phrase or sentence you want translated.
3 Pix can be easily enlarged or made smaller by hitting the + and - keys.
4 Many other keyboard shortcuts built in.
5 Voice feature for Windows, where a male or female voice will read aloud whatever you highlight.
6 Many other add-ons available.