I want to build a gaming PC, but, my god I'm out of the loop when it comes to what's the in hardware!

Im going to set a budget of lets say 100 per major component (great if its cheaper) -

CPU
MOBO
GFX

and then worry about the other bits once I have my main choices.

I also want it to be as quiet as possible, no GFX cards with 1million rpm fans and no, I don't want to water cool it! I want it to play most recent games with middle of the road quality (better than my 360) I'm happy with over clocking as long as its quiet.

So, I am at your mercy, whats it going to be?