If you are registered, you get access to the members only section, can participate in the buy & sell second hand forum and last but not least you can reserve your preferred username before someone else takes it.
You were next, I was actually going to ask about the Brush in the same message (lost the Quote).
What's wrong with you? Look, I have Emacs on a Thinkpad X60 tablet with Linux void (3 gig RAM). Very small memory footprint because I don't use GUI. 117 MB. With four tabs in Firefox not even half a MB.
I am currently using an Imac right now as @efsk can tell if he checks the server logs.