good pc ? budget?

As it sits, this is not a good gaming rig, and it's way overpriced. A rig like this will not run modern games, and definitely not at 1080p. By contrast THIS: http://pcpartpicker.com/p/mbfdnn is a PC that is only a bit more expensive than the one you listed (although I have included Windows in this price so it is actually a bit cheaper than the one you listed) and it will run modern games no problem. Expansion with a build like this is limited, but in the $500-$600 price range that you are in, this is about as good as it gets. Plus if I had some more time, I could probably pick out a system that is even better for the same price. Seriously, do the comparison. The system you picked out is using integrated graphics, and for the same price (or less not counting Windows) you could build a system with a GTX 950 and have a fully capable gaming machine. You really ought to reconsider the build that you listed.