I used to use Coda and Coda 2 - I loved them, and they were true "Mac" apps. But I switched to Sublime and Vim for one reason alone - Cmd-T/Ctrl-P fuzzy file opener.
That one feature makes such a difference to me as I switch between big project trees that I can't do without it.
I'd happily pay Panic for Nova if they add that back in.
(Ironically, as I get more deeply into Vim, I've found the :find and :buffer commands to be faster and just as useful as the CtrlP plugin, even if they're not quite as forgivingly fuzzy.)
^Q isn't as fuzzy as I'd like it - I do a lot of rails work and being able to type apvwpeopsho to match app/views/people/show.html.erb is really useful
That one feature makes such a difference to me as I switch between big project trees that I can't do without it.
I'd happily pay Panic for Nova if they add that back in.