We have hardwood throughout most of the house and berber in the living room, the upstairs hallways, and the bedrooms. I don't have that many pics of it, but here are some.



You can kinda see the carpet in these ones.






I'm all in favor for easy to clean floors. So I would go with hardwood or the pergo type floors. I don't notice scratches on our hardwood, but I keep my dogs nails really short and they don't race around on it much anyways.
The berber carpet is a really tight weave (I'm not sure that's a technical term LOL), and it super easy to clean. And the tight weave means the animals nails don't get stuck in the loops.

Good luck with whatever you decide.