When I was on my Windows machine, I used FF since the .8 days of its Beta. I was used to it so I ended up going back to FF after playing around with Safari for a while.
I use Camino now, and it's great. It seems lightening fast compared to FF and Safari. I'll be sticking with Camino for the foreseeable future.
Been trying out Camino and I LOVE IT.. only thing i hate about it is that once you select to open the link in a new tab, it makes the tab you just requested to open, the current one.
If you want a close button on each tab download the extension tab mix plus. It not only adds the close button but its also a session saver and tons of other features. I stick with FF pretty much for this extension, i usually have about 20 tabs open at a time and if somethign crashes its one click to get all my tabs back. Also if you accidently close a tab you can right click and open up to the 5 most recently closed tabs.