@Ion Todirel: The Fractal Design Node was my first choice too. Compact and yet can hold 6 drives. However, I have a preference for aluminum and I can't tell from the website how many parts are plastic. LianLi has some decent design as well and they are almost all aluminum.
I still don't know what I will go with for the OS. FreeNAS is based on FreeBSD, which would be a plus. Windows Server is an expensive solution (well, MSDN might come to the rescue, but Microsoft definitely needs to offer a cheaper alternative for enthusiasts and hobbyists!). WHS would have been ideal, but it is no more and Windows Server Essentials by default will want to implement a domain, which is a NO for my home environment. I think I need to do some playing around.