I switched to Safari a few months ago and I find it’s much faster.
Me, too, and it is much faster but I have some firefox extensions that I need, and after running awhile Safari seems to hog resources (worse than firefox) and conflict with my graphics program so I'm back to the stable firefox 3 release. I've tried the beta too and will switch when my add-ons are updated.
Haven't tried chrome. Seems like it won't do what firefox does either even if it is fast. Building browsers without add-on capability (just about any program, actually) seem very dumb and limiting IMO.