Bitmain they hold the top spot and will for a long time to come and i guess why we haven't heard much on the S7 is because of the sfards miner due out next month .
https://bitmaintech.com/product.htm
Spondoolies may or may not come back with a home miner they said they want to but well see . .
http://www.spondoolies-tech.com/
This one is maybe but they want to much from all the rumors on pricing but i wouldn't put it past them .
http://www.sfards.com/
The Avalon4.1 Bitcoin Miner was one of the top three once it sold out they took the site off line and the Devper IS MiA.
and like alh said if you live in the US and want to home mine at some point you will need at least 1 240 line installed but have two installed to be safe . it's not a option either if you want to mine with 12 or more in your home in the US and keep your house safe from fires.
http://ehash.com/
I think you meant Friedcat and asic-miner tubes prismas block erupter's etc