I would recommend you a $120-150 GPU and 1 game, why? because with that GPU u have you can only play at low resolution and medium graphic lvl, at long term you will be wanting to get a better monitor, or increase the quality of detail of your games.
Also is easier get a GPU and a game, because by the time you finish to play, you surely have save some bucks to get a new one, and you will be playing those games at rally nice resolution and graphic details which you will enjoy more...
getting a bunch of games that will have low fps and get some laggy while strong gameplaying as SC II multiplayer is not appealing for gamers, or even casuals..
Its my opinion, sir.