My Mac just died, but I used TextMate for backend stuff (Ruby on Rails), but I used Panic Coda to do the HTML and CSS. For purely static sites I use only Coda.

Panic.com/coda

and of course Illustrator, Photoshop, Cyberduck on Mac Filezilla on Windows, Putty on Windows to SSH into my servers. I've also used Aptana for a bit and it was pretty good. Most importantly iTunes is running 100% of the time