Look at those folk that "selected" their parts and then have problems.
Integration of a new combo seems easy, until you find some combo that does not work. Your savings are vaporized.
When people always ask about getting a prebuilt PC such as alienware, they get a common answer: "Just build one, its 20% cheaper." Truth is, prebuilt manufacturers offer service you can't get when you build. Yes, building is cheaper, but if you screw up in the building process, say break a component, you're responisble, and you have to get a new part that they won't fix (not to mention that building is a time consuming process.) And if you buy a component that's faulty or incompatible and build it into the set up, you will not have customer support to check your computer, so you have to find out the problem yourself, and its unlikely to find out what's wrong with it, since there are so many parts. If you want to build yourself, do it, but keep in mind, there's a huge risk, I would reccomen a cyberpower or alienware.