I'm willing to buy tools if they add genuine value over a FOSS equivalent. One thing I wouldn't mind having is an editor with the power of Emacs, but made more user-friendly. There seem to be several commercial editors out there, but I can't find much discussion of them online. Maybe it's because the kind of people who use commercial software don't have time to do much blogging. ;-)
If you have used any, what was your evaluation? I'd especially like to hear how you would compare them to Emacs. I'm thinking of editors like VEDIT, Boxer, Crisp, UltraEdit, SlickEdit, etc.
Edit: Ah...I need to remove some ambiguity. With reference to Emacs, "power" often means its potential for customization. This malleability comes from having an architecture in which most of the functionality is written in a scripting language that runs on a compiled core. Emacs (with elisp) is by far the most widely known such system among home users, but there have been other heavily used editors such as Freemacs (MINT), JED (S-Lang), XEDIT (Rexx), ADAM (TPU), and SlickEdit (Slick-C).
In this case, by "power" I'm not referring to extensibility but to realized features. There are three main areas which I think a commercial text editor might be an improvement over Emacs:
Stability The only apps I regularly use on Linux that give me flaky behavior are Emacs, Gedit, and Geany. On Windows, I like the look and features of Notepad++, but I find it extremely unstable, especially if I try to use the plugins. Whatever I happen to be doing, I'm using some text editor practically all day long. If I could switch to an editor that never gave me problems, it would definitely lower my stress level.
Tools When I started using Emacs, I searched the manual cover to cover to gleam ideas for clever, useful things I could do with it. I'd like to see lots of useful features for editing code, based on detailed knowledge of what the system can do and the accumulated feedback of users.
Polish The rule of threes goes that if you develop something for yourself, it's three times harder to make it usable in-house, and three times harder again to make it a viable product for sale. It's understandable, but free software development doesn't seem to benefit from much usability testing.
Answers Starting with the answers here, I searched through the 1200+ editors on TextEditors.org for commercial Windows and Linux editors according to my criteria.
It seems UltraEdit delivers the most features with convenience and polish. My only complaint about it is that some of the menu items are not named or located according to current norms. Since version 13, it has been scriptable in JavaScript. (BTW, v13.20 was the last to run on Win98.) There is now a Linux version, but UEX 1.1 is very buggy and incomplete.
SlickEdit is the 800-pound gorilla of text editors, but really it is more of an IDE. Most of its great bulk is devoted to supporting C++, C#, and Java coding, with a little support for the main scripting languages. It is generally viewed as an alternative to Visual Studio and I found its IDE features pretty neat. Judging it just as a text editor, though, I was aggravated by the absence or awkward implementation of basic functions. SlickEdit's learning curve is as steep as Emacs' and the documentation is inadequate, so the book from Wrox is worth a look.
A few others are in the same league as UltraEdit but had things that made them not as nice for my purposes. Boxer has many features, some unusual, but it also has a lot of rough edges. CRiSP has extra tools for system interaction, but is a bit short on text editing features. EditPad Pro has exceptional support for regexes, but I had issues with stability and feature gaps. Multi-Edit is powerful and extensible, but very un-user-friendly. VEDIT is blazingly fast and powerful, but looks like a Win95 app and lacks features now common on power editors.
Beyond these, there are a lot more, but of what I saw, there wasn't much to differentiate them from the better free editors. As an aside, I discovered that if all you really want is extensibility, it's quite easy now to find an editor that uses your favorite scripting language.