470 with optiminer can reach 120 sol apparently, i don't have any but there are numerous people on the forum with that speed
to me it seems the best compromise between a cheap card and good hash
I have a few 470 4gb, from different brand, and with custom bios (1500 timing everywhere) then do 120Sol with claymore miner v5.0.
So, i think that they have the best profit ratio in the market