just search for the best parts..
ill tell u a story. this story says, why building PC's is better than buying them.
I had friends who wre building PC's, so i went to them, i was needing a new PC, i said, build me an omagawd shit motherfucking kick ass PC, they asked, how muchim ready to spend, i said..1500$, their answer was: come back tomorrow.
and u know what i got for that price?
this was the time when i7 just came out.
These niggaz made me a PC with super good processor,graphics card and all shit and only for 1500.$, PC with these specs would cost like 3000$ in the shop, but i got it only for 1500 ...
That PC was at the time when AC 1 came out.
It was running it at 300FPS on max graphics.