On Windows, I've been using the very capable UltraEdit for several years. I continue to use it under Parallels on my new MacBook Pro but I'm really interested in finding a comparable text editor for Mac OS X. The stock text editor, TextEdit, is far too lean for my needs. I'm playing with Smultron and like the tabs and line numbering but I miss the more sophisticated regular expression search and replace that comes with UltraEdit.
Do any of you have suggestions for a good text editor on Mac? Years ago when I was using Macs a lot more, I'd settled on BBEdit. Is that still the premier editor on Mac?