If I were you, I'd wait until Jolla will release their handset. It shouldn't be too long. The main issue - Harmattan is a dead platform. You can of course run the community distro (Nemo Mobile based on the Mer core - community fork of Meego) on N9. But it's not a full user experience yet (it's lacking some basic features like e-mail client for example). Jolla are basing their OS on Mer as well, and are planning to release a handset with it next year. See the related thread: http://talk.maemo.org/showthread.php?t=85315