Have you tried out "Chrome," the new browser from Google?
It's not perfect, and amusingly doesn't work all that well with Google Docs, but it's pretty nice. Fast.
One interesting and actually quite useful thing about it is that when you open a new tab (which you do instead of opening a new instance), all the recent pages you've been to are displayed in that window in "large thumbnail" form, and you just click the one you want to go to a refreshed version of that page. Quite cool.
I don't know if Google has achieved its objective of bullet-proof reliability, and making Chrome crash-proof by running individual pages as fully independent Windows processes, but it seems pretty solid.
And it's fast.
You can read the official Google press/public release, in the form of a somewhat corny comic book, here:
http://www.google.com/googlebooks/chrome/ (I made it about halfway through)