Seriously, if you want the most for your money build it yourself. I too was terrified I would burn the house down and start a nuclear reaction by inserting the wrong thing in the wrong place but I did it and my PC has been purring like a kitten for almost a year now. Back when tested was still around Jeff and them did a build a PC thing with Will and Norm and I just followed along with that as I built my new machine. It really is just one of those kids games where you need to put the square peg in the square hole and the circle in the circle etc.
The high and feeling of accomplishment is like no other. If you are dead set against it however, I can't add anything to the conversation as I don't follow prebuilts and what's good at the moment. Just wanted to be one more voice adding to the build it camp.