Jokes aside, that's a much more memorable name and I think you should stick with it. I can never remember the real name and only come back to your site when it's mentioned on this forum.
Same here, thesixtyone is a very bad name. I couldn't even remember it one hour after visiting the site. Also it doesn't have anything one could Google for (memory hints I mean - you remember parts of the name and google for that, no dice with thesixtyone).