@yi_orange: Check out r/buildapc on Reddit or tomshardware.com if you want to get a lot of knowledgeable information. If you post your plight to build a PC, then I bet you'll get a few decent builds. Like others have said, pcpartpicker.com is a great resource.
logicalincrements.com is a great place if you want to skip the development step and just find a build that fits your budget.
My personal advice is to ignore overclocking unless you really are into it. The premium isn't worth the performance gain in gaming.
For this price range a i5-4590 CPU should work well with a 770 or 280x GPU (depending on manufacturer preference). Storage wise, a SSD with a HDD for games. Be sure to pick up a second HDD if recording gameplay(don't want to skip any frames!). A common mistake is to overspend on the PSU. The simple solution is to buy a quality brand (Corsair, Cooler Master to name two) with the minimum required wattage for the GPU. Wrapping up, 8GB of 1600 MHz RAM should be able to be bought for ~$70. You do not need more than 8GB unless you will be doing: virtual machines, CAD or professional video/photo editing.
@shaka999: You currently don't have a aftermarket cooler in your build to use the overclocking capability of your CPU.
I know a lot of people think overclocking is the shit, but it's really a useless premium for what you are going to be doing (which is gaming). Save $90 or more dollars and put that towards a better GPU or SSD. A better GPU or SSD will give you a far better performance increase then the measly 2 or 4 FPS you might get in a game by overclocking a CPU.
I put together this system, which I think gets you a better deal for the same price. The big difference being that you'll get a 120GB SSD for you OS and a few games. You put about 150 more watts to your PSU than the GPU's recommended power requirement. That requirement is given for people that buy off-band PSUs. The 500W bronze certified PSU in this new build is more than enough. A lot of first time builders spend more on their PSU than needed. I also got cheaper RAM, since you don't really need to spend more money for red RAM whose extra speed really isn't helpful to your needs. DDR3-1600 is quick enough for what you need.
Imo overclocking,while "cool", is a waste. You should really check out r/buildapc on Reddit and ask for their advice too.
There's nothing like using something you made yourself, but @phileskyline's suggestion looks well enough. TBH you wouldn't even have to upgrade the PSU should you want to get a GPU that requires a 500W supply. Those min specs are usually for people who buy low quality PSUs.
Should you want to make a PC, here's one from r/PCMasterRace
PCPartPicker part list: http://pcpartpicker.com/p/3101r
I already picked up the PC version for 599 Pesos, which was more of a steal when the Peso was weaker. Free is more of a steal than what I paid for, so it seems like a smart buy if you want an Xbone and Titanfall.
I've never really had an attachment to Transformers at any point in time. The trailer looked interesting, but that's the point of them right? I'm sure it will be a somewhat average, high budget action movie. I'll redbox it sometime.