I'd actually recommend TextWrangler for the specific application mentioned. (TextWrangler fills the role of the what was previously BBEdit Lite)

You lose the glossary/macros/clippings/whatever they want to call them this verson (you can work around this with text filters), and some of the HTML features, but it'll still do the job requested, at a much smaller size. (and, well, it's free, which is nice, too)

Disclaimer: I have been a beta tester for a few BBEdit releases, but I get no compensation other than comp'd software