no no .. prove that system you will recommend is cheaper & better than nMP
As I mentioned before, my current PC setup is:
An ASUS P8Z77-I Deluxe motherboard, 16 GB of DDR 3, and I put a Core i7-3770 Ivy Bridge 3.4GHz. I scrimped a bit on the video card with a MSI N670GTX, but not bad considering I am not a gamer. The onboard Realtek audio is good enough for basic tasks but I have add a HD2 Protools card as I use this machine as my home studio (replacing my former BOSS standalone multitrack porta-studio). My main hard drive is a Seagate 600 Series SSD 240 GB with a Seagate barracuda 3.5 TB HDD for data. I use a Corsair power supply, But I forget which one, it was around $70.... Case and fans have been around since 2 computers ago, and they are cheapo Hamfest items... Besides Windows 7 it will Dual Boot to 10.8, which I installed from original Apple File (from a 8GB jump drive). Put an Apple sticker on it, and it would be my idea of the perfect xMac.
The machine is not overkill, but it's strong. Most importantly, it can be easily upgraded....
As far as the "Case" is concerned (as you proudly mentioned in your OP), I could care less. I think this particular case cost me about $25 at a Hamfest 3 or 4 years ago. Who cares??? I'd happily mount the MB in a cardboard box if I had to. I'd much prefer that than a computer that has components glued and soldered in and is not internally expandable or user serviceable..
What is "better" is up to the user, and my needs are pretty much what is shown - plus the (Very Important) ability to expand and service the system easily...