Xbox One or Play Station 4

I'm looking for a game console with a lot of power that can run games amazingly and it seems like the 2 are the xbox one and ps4, but I never use my older ps3 at all and I use my xbox 360 all the time and I love it. I also love halo and games like COD. So should I go for the more expensive xbox one with better online services, or should I go with the amazing design and cheaper ps4. Please comment and give your opinion.