What about bitfury?  And blackarrow actually has shipped actual hardware (their bitfury based line of miners).  Bitmine to me seems like the most likely to deliver (they have before)...  If you are including BFL (i honestly can't imagine anyone serious about mining including them in any good top 5 list) then why not Avalon (who seem to have truly gotten their act together).

And you are missing the company that actually produced the first commercially available asic based miner - Asic Miner.

Who put this list together?  Is it just based on whether or not the company sent you a press release?  Seems like it wasn't researched....