
Gaming PC-Ready made or custom built?
You can buy premade gaming computers that will easily outperform anything - but the price tag will be out of yours (and a lot of other gamers' budgets). I will recommend that you get yourself a custom built computer, but pay close attention to fans and cooling, and also make sure you don't cheap out on storage (250-300gb+ ). Also look for one of those super HD moniters (They are like 3840x2160 or something). ATI Radeon's are your best bet for Gfx cards, buy the top of the line perferably.
So, in summary just make sure that you don't cheap out in areas, make sure everything is acceptable and figure out what areas you need to buy top of the line parts.
I know that Alienware has liquid cooling and fans - the glory of liquid cooling is its silent, and it works also using less power than a fan. I'm not sure if you can implement this in your build, but consider it if its possible.