Yesh, DDR3 ram is best(3 gigs is good), I'd recommend getting a Dual core procesor with at least 2.7 Ghz capacity so you can run SC2, solid state drives are the most stable, though you probably won't need more than 250 gbs of space, and No you don't really need any special tools, just give yourself one day of quiet with no little kids in the room you are assembling it in and some screw drivers, the internet, and some patience.