I have decided after a long hiatus to get back into PC gaming. I currently have a ps3 which I'd prefer to use for multi-platform games (I like sitting on my sofa). Therefore, what I'm looking for is a PC, most preferably a laptop, that will enable me to play strategy type games that only exist on PC. I'd love to play Crusader Kings 2, Civ 4 & 5, GalCiv 2 and, ahem, The Sims 3. I assume I don't need a top system for these less graphically intensive games which is why I hope a laptop will be available.
My budget is approx £600-£700.