Just finished the new
XCOM game (PC version), though on the pretty easy "Normal" difficulty only.
I've been really impressed by it. It's a lot shorter than the original, but it's more that it's streamlined rather than dumbed-down. It's still a proper turn-based squad game, and still has most of the tactical complexity of the original, both in the missions and on the map.
It's certainly worth a look for fans of the original, or other gamers looking for something different to the piles of FPS games around at the moment.