i am ready to make my first purchase of a gaming Pc. i have been using my 5 year old laptop hooked up to my TV, but it doesnt have enough juice to run Civilization:Beyond Earth. i want something that will cost $700 that i can hook up to my tv. i want to be able to upgrade it down the road. i am pretty sure i want an intel i5 based computer but i have no idea if that is neccesary. i have almost no knowledge about these things, any suggestions would prove incredibly useful to me right now. please help. NOTE: I do not want to build my own computer, i would much rather buy something ready to go out-the-box.