It's 2014. If i was in your position, i would definitely go for a Jolla. I've had N900, N9 and now Jolla (since December) and i never had the feeling, i want to go back to N9, because:

• sdcard support
• no need for nitdroid, because of android compatibility
• changeable battery
• real root-access, no aegis
• much smoother and faster than N9
• much better battery life than N9
• extremely fast growing number of native apps compared to apps not working / being developed on N9 anymore
• TOH-concept, with exciting stuff like QWERTY-TOH

plus: after having used abandoned systems for almost 4 years, it really feels good, to use a system, that is "alive" with new exciting stuff happening every week.

only thing, that was better at N9, was the display in my opinion, but when you come from N900, you won't miss it