robokassa.ru — accept not bad. Now they're banking organization, therefore, future problems will not be. Only, there is a limit on 40K rubles per transaction, if you want to spend more — just write request. Returns immediately discuss, because they have this difficult (judging by the e-currencies). Interest does not move.
epaysystem.ru — everything is easy with returns, but in the real production system not yet tested, so I can only say from personal communication with the staff that the company has adequate worth it to pay attention + the results of any communication can really rate to give less than ROBOKASSA.