As my default browser, I’m just about to switch from Opera to the beta version of Safari 4 on Mac.
It’s fast. (smaller is faster)
The main thing this graph shows is that Internet Explorer is for idiots. It’s horribly slow.
Opera is good. But has some annoying features that cannot be modified.
In future, I will keep Firefox and Safari open at the same time, switching back and forth. Safari now offers full screen zoom like Firefox. That’s the main feature I need, aside from speed.
Google Chrome is not yet available for Mac.
Cnet – Safari 4 benchmarked: 42x faster than IE 7, 3.5x faster than Firefox 3
Arstechnica – Hands on: Safari 4 beta fast, mixes polish, rough UI edges
Rick McCharles 
Hey Rick,
It is possible to run google chrome browser on your mac or in linux. Here’s how to do it…
http://www.codeweavers.com/services/ports/chromium/
Thanks Dave. I had heard about it.
I could drop Firefox and run Chrome and Safari.
… until I switch to Unix, that is.