I switched to OSX about a month ago. It's great. As for Mozilla, It's a dog under any other OS. Konqurer has been making a showing, because it is a lot lighter weight. Safari is built on the Konqurer engine. To be honest, the deciding factor was the ability to get Linux applications to run on OSX through X11. With Fink and X11, you can just use "apt-get install XXX" to get your favorite Linux programs, both for desktop and command line. While X11 through OSX is not perfect, it works quite well