Norco RPC-4020 4U BubbleWrap
 

As good as the chassis is, there are several things that pulled it back from being top dog. First for the size and weight of the case, let alone the price, a set of rails should be included. The case is too heavy to keep removing from a rack when needing to perform maintenance or upgrades. Getting it into the rack in the first place takes at least two people and the rack ears seem to hold it, but for how long?
http://www.overclockersclub.com/reviews/norco_rpc_4020/