Im thinking about getting Xcom.
Very enjoyable game, just keep in mind the game is very difficult when you first start, and most people tend to get 5-10 hours into the game and must restart. The reason being that the game doesn't give you a good enough tutorial to make you understand exactly how important satellites are, and they take so long to build and it's so difficult (when you start out) to get uplinks going to host them, that many new players fall into that trap and it's game over 10 hours in.
This game plays a lot like Civilization in that if you make a few wrong moves 15 hours in, you very well might have screwed your game. Time to start over. It's definitely not for the faint of heart or those who don't like to start games over.
Just do a Google search on how to properly start a game before you start playing.