What is better in the office of the Wii or Xbox?

We move to a new office, we have a desire to make a game room for employees, we have darts and other casual stuff, but we also want to touch on digital. We decided to put a plasma panel and a game console for it.

If someone has experience with prefixes, advise something. I've heard a glimpse from Mr. Deniskin that they have a Wii, why is she?