You don't even need 30 GB, max you need is 7 GB,
You don't need that good of a CPU.
2 GB RAM? I'd probably only get 512 mb or 768.
You don't need 850 wawtts.
You don't need a badass case.
this made me lol, but I would agree. If i was building for mining, and mining only, I wouldn't spend on the extra.