Secretly, I am just jealous that you have coda and I have to use multiple screens because Coda doesn’t exist for Windows.
Funny.
I once read, years ago, that BBEdit was a good reason for a Windows PC user to buy a Mac. That’s no longer the case. Both platforms have plenty of very competent text editors. Each religion gets you to the same place. I use BBEdit heavily because it’s familiar and the workflow is seamless. What Coda does well is that multiple window pane approach—perfect for code, CSS, HTML, live preview. Whoa. That’s nice. All Mac editors, save CSSEdit, don’t do CSS very well. Even CSSEdit has languished.
That said, I use an editor to set up and EE framework and basic CSS. From then on, much of my actual site editing and tweaking is in a browser window. By hand (I cheat and use snippets, though).
I’d probably consider Coda the perfect Mac editor if the CSS component was competitive with CSSEdit.