I have the N900, N9, N8 and Lumia 800.

Go for PureView 808


More detailed:
Best everyday phone : Lumia 800 - by far.
Best all round: N8, N9 is close though, but lacks too much HW goodies.
Best geek (read Linux): N900 nothing else comes close.

But. If you go for the N8, you will be much better off with the 808.