Really weird that they label them 'gaming pcs' and then offer low-mid level graphics card as the highest option.
you hit the nail on the head on that one, the i5 cpu is right on but a 500 GB HD, i put in a 1 TB for a 2nd HD for games.
Please tell that you didn't take it with the ticked option from the link you posted: "Intel HD4000 Video Graphics"

If you did, calling the rig a "Gaming PC" is highly exaggerated and should be punished by law by misleading a gullible customer. 
wish i did have a choice in the video card but i didnt, reason why
i got this from tiger direct as is,
the cost of this one was just alittle over $800, the same one on cybertron starts out at $800,
SWrokit sent me a alittle older card NVIDIA GeForce 7950 GT, working pretty good, finding some limitations of the card tho.
it does have that modern gaming look about it, got it at a good price, its not limited in making mods to it.
made more mods to it and past those later here