good luck to ya! I've never looked into a gaming PC as they are WAY to expensive. And constantly need to be upgraded. Granted consoles are to fuckin expensive as well, considering their limitations. But 3k for a computer JUST to play video games...seems a bit excessive. Also I'd imagine when it comes to gaming PC's you wouldn't want low end components ruining your gaming experience.
That being said I have a couple friends who've built their own gaming PC's though I've never talked with them about em as I have no interest in doing the same. If I remember I'll talk price next time I see em.