To whoever is asking, NFC on the N9 does not support secure elements. You won't be using it to pay for anything.

NegriElectronics is a reputable seller.

The N8 and N900 are completely different devices for different usages. You can not replace one with the other, but I tend to carry the N900 as a secondary device before the N8...granted, the N8 is pink, but it's just not as versatile.