More important than which distro you use is how is it configured... But as newbie-easy-to-use-and-configure I'd recommend you mandriva 2007 PowerPack, it comes with commercial drivers (for nvidia and ati video cards)and cedega included and working out of the box. just ready for DirectX and OpenGL gaming..
Still you can download install and get to work by yourself those drivers and cedega in almost any distro... but id you ask for 'easy', Mandriva PowerPack is the way to go for you.
That is my recommendation.