DSzymborski, just because a company produces one bad product doesn't mean all of them are. Every company has produced a bad product before, but that doesn't mean other products from them will be. While the PSU is important, its still better to get a cheaper part than cut back on his RAM or CPU. If the computer isn't using a decent CPU and RAM it may not be a real improvement over what he had before.
christop, The power supply you listed is not the same power supply in the case. Not only are they different colors, they have fans placed in different areas and probably are different in the connectors on them. I am not taking this personally, I am just point out that I believe it is best for the customer to use that PSU that comes with the case. Pretty weak to say I am taking it personal because I disagree with your opinion. That doesn't make what you say correct, and neither does stating you have build computers before as I am sure most people answering questions have built numerous computers. It is still true however that schools and businesses buy hundreds of computers from companies like Dell, HP, Gateway, whatever and use them for years. Often for more than ten years, and all of them have similar low quality PSU's as are in this case. If the person also disagrees with me, he is obviously free to buy whatever he wants, but if he is really tight on cash and decides to buy a case like I listed with the PSU and it works fine for him with no issue then clearly my posts were inevitably helpful to him. Not just personal and argumentative.