Totally worth buying. If you liked the first Starcraft, you will love this.

I've only been playing campaign so far. It is fantastic IMHO! Great storyline. Great cinematics. A bunch of cool new features.

My system is a dual core E8500 oc to 3.8 ghz, Radeon HD 4600 512mb, and 4gb of ram. I'm running it at 1080p. It's a little choppy to run full out (but still playable) so I have it set slightly lower. I never intended to game on this computer so I didn't put in the best video card.