http://twitpolls.com/s/2ES << Poll!
they all sound so good!
Whichever one isn't the Xbone.
XBox 1, it stops those leech friends of yours from using your system to play their games and forces them to use their own, thus more game time for you.
It also actually follows its marketing better: One system, one slot, one character (Killer Instinct), etc.