I would advise against getting Ghosts.
I received it as a present on Christmas day and the single player campaign is boring, extinction is quite entertaining, better than Zombies, but the online multiplayer is just a horrendous experience.
The maps are too large, there's too many areas for people to camp which they have been doing in their droves, quick scoping has made a come back and there's virtually nothing you can do about it, the kill streaks are overpowered. Good luck handling a player with the maniac or juggernaut killstreaks.
I'm going to trade in Ghosts and just go back to playing Black Ops II.
Also good luck trying to find games of Search and Destory, Blitz and Cranked on the Wii U version. I just about managed to get a few matches on Infected.
Everyone seems to just play Team Death Match and Domination.