1. ASICMINER (Friedcat)
2. BitFury
3. Kncminer
However you need a very great number such as 2Th/s or even more to follow up. Before you add these actual beings, You should use virwox to ask first 0.4 BTC (Which should be 78 USD), Put the 0.4BTC on cex.io, Then you can do other later on as if you cannot obtain real hashrate, useless, meaningless.
So BFL, Cointerra, and Hashfast are still considered unknown if they actually delivered their ASICs? I know Terrahash is a scam anyway judging by the responses on the thread. Might have to look into those companies you mentioned.
Well, BFL, Cointerra, and Hashfast delay their delivery, 1 month is bad enough in Bitcoin World as your profit drops about 60% every month....