I know this really boils down to preference but after trying Safari, Camino, OmniWeb, iCab, Shiira, Sunrise and others; I have concluded that Firefox 3 is the best and here is why. There are a lot of browsers with cool features but I haven't found one that I can't get for Firefox using plugins. Sometimes there are features that i don't have any use for in other browsers but in Firefox i just add the functionality that i need and leave the rest via add-ons. Firefox has true StumbleUpon for free. You can make it look virtually identical to the other browsers if that is important to you. I have made Firefox run just as fast if not faster than Safari by enabling pipelining. I know that Mozilla makes Camino for mac but it is too limited in terms of features and extendability. And i have never been able to get it to run as fast as Firefox on my mac.