Everyone comparison shops... be it computer components, automobiles, or groceries. If you didn't, then I want to be included in your will. I agree with the suggestions both repliers posted (mainly... chill out). Tom's Hardware (site) has been going down hill for some time. The reviews are biased, and offer very little insightful information that isn't already being reported by others in the hardware community. Anandtech.com has several "buyer's guides" with LIVE (let me repeat that... LIVE (also know as "real time")) pricing. Granted, assembling components to build a computer is not exactly the same as going to your local dealership and buying a car, but building a computer from components is similar to a car enthusiast picking out high-performance or modifications for his/her car... there IS lots of reasearch involved. If you're NOT willing to spend that time, then a pre-assembled system from Dell, Gateway or an off the shelf system may suit your needs... or should I say, relieve your grief. Complaining about how difficult it is these days to "assemble" a computer from components, may prevent new comers from attempting to build one themselves, but will not get any empathy or sympathy from those of us who already assemble our own.
P.S. Picking out a power Supply isn't a matter of picking a brand, pretty color, or total maximum wattage anymore, you do need to know the max AMPS each voltage rail can handle, as well as if the power Supply has all the correct connectors needed for your particular setup.