This comment is slight OT, but Netscape 6 is a *VAST* improvement over netscape 4.77 for *nix. (I haven't had to kill -9 it once!) I'm gusssing your experience of netscape 4 has made you leave out netscape in the list of 'coolest ones'. :)
Still, it would be nice to have a good open source web browser. I think it's likely that mozilla will make the grade soon. BTW, there is GNUNavigator which is a browser bolt-on for emacs (IIRC). I've no idea what that's like though.
Also, what about konqueror? The latest version has better CSS 2 support than any other browser, (that's including IE 6) IIRC.