Linux on Gaming Desktop

Hi all,

I need a high performance computer with Linux install for a project. As I'm not an expert, I thought that a good way to go is to buy a gaming desktop ready out of the box and install linux (Lubuntu) on it.

I was thinking on the Alienware Aurora gaming Desktop.
However I have seen in some forums people that have problems installing linux on alienwares. I wonder if anybody can advice on what is the way to go or possible alternatives.