cheap & reliable taxi center from/to Sherementevo (Moscow)

Hello everybody,
I am quite new in Moscow, and I have remarked that there quite big differences in taxi prices according to different companies, especially when driving from Moscow center to the airports.
For instance I have seen that from Sokolniki city center to Sherementevo the fare can go from Protected content to Protected content , according to the companies that I have tried so far.
A friend of mine has told me that there could be cheaper ones (for Protected content , but he does not remember the names. Maybe you could help me?
So far, the best and cheapest one I have found is New Yellow Taxi (Новое желтое такси).
Maybe can you recommend me?

PS.: I don't need English speaker taxi. Russian speaker is ok with me.
Many thanks