I’m playing around with Notepad++ atm. It has a lot of the features I want but it’s very distracting and I’m not sure why. It may just take a while to get used to the keyword highlighting.
What really bugs me so far is that when you press HOME it doesn’t take you home. Instead it takes you to the first character in the line (which causes shift-downarrow to not do what you want). Pressing HOME again toggles between the beginning of the line and the first character in the line. I suspect that I could get used to that as well.
It does, however, have block tab features which I really like.
All in all it isn’t as finished as Coda looks but I think it may do.