I am not very computer literate when it comes to hardware, but this guy has never let me down with 3 different computer builds as far as hardware compatibility. I've built his highest tier ($1600) at one point, his second highest ($1000) just a year or so ago and a mix of his 2 lower tiers (~$650) recently for my little brother and literally have had zero problems. Better option than alienware, especially if you buy during newegg sales or have amazon prime for free shipping or whatever.
http://www.mmo-champion.com/content/...age=5#comments
Just scroll down to "Computers - Setup of the Month" to see his most recent builds. He does them every few months and mmo-champion posts them up.