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.