Hello my friend, I've missed you. Is it too boring at one of AM threads ?
None of those companies can match the price point of SP30 with current gen and Q3 planned hardware.
It has already been done.
http://shop.rockminer.com/goods.php?id=342880gh for 4btc.
I see a render, not a product. I also see 2.4TH/s, not 2.88. Oh, and it'll need 2880 watts (maybe you swapped the hash rate / power consumption). 2 of these things still won't get you the equivalent of 1 SP30 hashing rate. Oh, and price. 8
BTC for 2, no PSUs included, which puts it more expensive than the SP30 for less hashing.
Might want to reconsider the "It has already been done" statement.
Not to argue one side over other, but as of right now one Sp-30=12.72-13.64 RK-boxes (at $7500-8000 plus $600 PSU plus $500 Rpi=total of $8600-9100).
So, you pay premium now for sure. i think that Rk-box is overpriced because it is aimed at "home" market. I feel that spondoolies had proven themselves as very able engineers.
Besides, I would probably switch mostly to colocation-too much trouble "hosting' these beasts at home, at least during summer.