I love my Coda + CSSEdit combo, it's awesome for what I do. I don't do any heavy PHP outside of includes, and if I'm working on .php files then I use MAMP to preview locally.
I was a DW user for years, but I got a job at a small design firm and budgeting was a little tight, so spending several hundred bucks on DW wasn't much of an option. I had grown tired of how HUGE it was, and all those _notes folders showing up everywhere drove me crazy.
I tried Textmate (?) but it was too programmy for me, sKedit was okay for a little while, but I wanted built in FTP, I tried the Wrangler one too but didn't like it either, and ended up on Coda and really really like it. For what I do it's perfect, lite, clean, easy, and I like Panic stuff.
Team up with CSSEdit and two monitors and it's fantastic for me! It does have auto-finish on coding, providing you pick the right syntax. For a version 1, I'm happy and quite excited to see the changes. I emailed them about one issue and got a personal response by one of the real Panic team developers, not a Customer Service person.
I love it.