I didnt wanted to say it, but I actually went from N900 to N9 to Blackberry Q10. My feeling about BB10 right now are:
Its incredibly user friendly. The type&go feature is awesome, the keyboard itself works pretty damn good, I actually like it better then the N900 one and the browser is awesome. With sideloading you can have all the apps you want and the screen is really big enough for me, ah and dont forget the hub. Just one thing: I would like to have the ability to tinker with it a little bit, but that seems pretty impossible.
I really can`t understand why the BB10 devices aren't working for more people out there... its a really nice os and the Q10 is a quality phone... Ah + Battery. I get 1 1/2 days easy with moderate - heavy usage.

edit says: Downside is the really lacking Blackberry maps. But thats it so far. Nokia here in the browser seems to be the best solution for that right now...