Thanks to Dave Cooper for turning me onto Notepad++. I have recently converted to using it as my notepad replacement. It has many cool features that can be useful such as reordering lines of text alphabetically. It has a tabbed interface and is pretty quick. If you want to make it your Notepad.exe replacement, you can find the 'Notepad Replacement' launcher here: http://notepad-plus.sourceforge.net/uk/download.php.
Enjoy!!