I understand you mean your receiver is Dolby Digital EX and DTS ES compliant, has digital input, and that you have connected 6 speakers + sub? If so, it's just to connect digital cable (coaxial or optical) and enjoy.
Almost any player would do. 6th channel is encoded within the other ones, and player will just pass digital signal to receiver. Only restriction is that some cheap players may not handle DTS (no logo on those).