Seeing how you are selling the N8 already i'm not sure why i'am answering.
I would keep the N8. It's still the best camera phone out there and is getting the crucial Belle update in 2 weeks time, making the UI experience 10x better. Neither are you getting much out of N8 selling it as it was hugely popular, more value to keep it to yourself.

Actually thinking myself to buy N8 as the Belle update is nearing closer.