Welcome to the mac world.
In regards to your question:
My workflow is similar, PS for design and then I personally use TextMate with a bunch of add-ons for coding HTML/EE/CSS.
I like the TextMate snippet feature just too much to consider using Coda again, having said that Coda’s Clips feature is quite okay, just not as good as Espresso’s (http://macrabbit.com/espresso/ <- very nice app too ) and TextMates.
If you don’t want/need/care for any live previews or overly pretty interface then I would recommend TextMate strongly.
If you do like the fancy addons 😉 then try out Espresso first, followed by Coda.
PS: I own licenses for all the mentioned apps, so this is said with the least bit of bias 😊