Dell XPS here, built on their site by me. We're all Dell or Alienware. I used to have nothing but Alienware but my last gaming machine, I left out the cooling system. BIG mistake. I fried it.
We had Macs a loooong time ago because my husband was a Graphic Design major. We made the switch to PC because we love our games and Mac just couldn't compete. I'll admit they're more stable machines in terms of the OS. But my PC is a beast.