wanting an absolute monster

Hey everyone I've been reading and reading the forums here and you all seem very knowledgeable and fantastically friendly! I unfortunately haven't been able to get the hang of computers or builds (i do have a friend that OC's regularly and knows all that super fancy stuff) but I don't want to bother him with my next computer I wish to get.

I want to impress him by building an absolute speed demon. I'm not sure which of the newer intel processors are better or which overclock better (I will be leaving that to him) but I was hoping you guys could help me out!

I'd like to put together an intel rig that is the fastest possibly machine there can be (price is no object) I do mainly gaming and emailing but it's going to be used by others that do more intensive things, nothing extreme though like rendering.
The only thing I know for certain is I had my eyes on the new nvidia 670/80/90 series cards and I am definitely getting at least one of those!

Any insight or suggestions would be very appreciated to this newcommer and then maybe I can start to understand what makes these fast parts you recommend, so damn fast!