Cooler Master has accomplished exactly what they have set out to do with the release of the Sileo 500 chassis. Whether or not your choice is to go with or without the PSU, the chassis alone is worth every penny of the asking price. With cases such as the NZXT Beta, or one of many others for $50, none offer the comfort to your ears that the Cooler Master Sileo 500 does. This is by far the most silent build I have done yet. As I alluded to, it took me getting within three feet of the Sileo 500 before I could actually hear any audible noise.
Complaints, well I can't honestly think of any. Due to the design of the Sileo 500, wire management holes are pretty useless even if they were there. I would have liked to have seen a cut out for access to CPU back plates; I mean they followed so many up and coming trends, I think this may have gotten overlooked. Other than that, I think a window may be needed as a requirement of some buyers, but just be aware that a window doesn't block noise half as well as steel and sound proofing material. You will lose some of the silent properties if you opted for a windowed version, or modded it yourself to have one.
What I am left with is a budget priced chassis without the power supply. This chassis does offer a lot for its 54.99 USD, Newegg asking price and makes me advise this chassis above all others for its price when you are searching for a silent build. If you are looking for a good deal on both the power supply and the chassis, I can't come up with any reason other than GPU power requirements to go another route than the $99.99 version at Newegg. All things considered, the Sileo 500 is the way to go if you need a silent gamer, or a sleek larger HTPC that sits in an open area.