I've been looking into this area for a while (text editors for writers, that is). If all you really want is a blank screen and the ability to type and save plain text, then Q10 is fine.
But to me a text editor for writers implies a bit more than a plain text editor. As a very minimum, the ability to help you organise your text files at a very basic level (e.g. by chapter/book etc). But you also don't want too much in the way of bells and whistles. You want it to be fast and lean (like any good text editor). For example, I don't want my writing program to become my research collection program, with folders of web snippets littering the interface.
With that in mind, my search lead me to PageFour (
http://www.softwareforwriting.com/). It's not plain text -- it saves to RTF. That's fine by me. RTF is a good choice for making sure you're not trapped in the program, and does offer the option of basic formatting if you need it. Most importantly, I find the interface clean and easy to use:

And if you just want to concentrate on the text, you can remove the main toolbar, formatting toolbar, status bar, and the notebook tree and voila -- a text window. Drawbacks? Only minor ones. There's no real-time word count, which seems odd for a writer's text editor. And the word count comes up in a separate window, which is clumsy. I also don't like the fact that the licence is a single machine licence (an issue I raised in another thread:
https://www.donation...ex.php?topic=12161.0) but the developer has promised to consider giving the option of a single user licence.
EDIT: Credit to the developer of PageFour. As of February 8 and the release of v1.67 (beta), the licence has been re-written, giving the option of a single user licence.
As an aside, many discussions on this subject around the webosphere seem to conclude that the best editor for writers is Scrivener (
http://www.literatur...e.com/scrivener.html) for the Mac -- and that includes people who use both PCs and Macs. I don't have a Mac so I can't test it. I do love the idea of having a built-in "corkboard" (I'm considering SuperNotecard for that -
http://www.mindola.com/).