Just Transaero S7 and Aeroflot?
The problem comes when you book with Aeroflot for connecting flights, you may get Donavia or other companies without much information or little opportunity to change flights.
S7 scares me badly as they really dont appear to have much of a safety culture at all. I have flown with them a few times and have been a bit worried about taking off with snow on the wings, and some very uncomfortable landings. Far worse landings than I have had with any other airline, I can accept a go around when it is required, but seeing the wing tip get only a couple of meters from striking the ground in a crosswind landing is frightening.