WordPress is just perfect with everything but not with the tinymce editor.
I am sorry for criticism but this is just something i wanted to get off my chest for a longtime. If you want an alternative editor, why not consider this work: http://corpocrat.com/2008/12/18/free-wysiwyg-textarea-html-editor/. The code is way too simple and very lightweight and can be extended.
The whole wordpress download size would shrink by 50% if you can get a lightweight editor or why not just use bbcode instead of html.