Alienware has been part of Dell for years now, but keeps designing unique and powerful gaming systems. Take the X51 R2, for example, a very sleek desktop gaming PC that's compact enough for the living room.

Once upon a time gaming PCs were synonymous with huge and loud tower desktop systems. While of course still much more expensive, they are getting closer and closer to the size of a traditional gaming console. The X51 R2 also resembles one of Dell's compact business PCs, but with much more...