Some BD players decode internally and some don't -- the ones that don't bitstream the signal to the pre-pro to decode. Since the Lex doesn't decode, you need a BD player that decodes internally.
I believe the BD players that decode internally pass the decoded signal through analog outputs. If you have a 7.1 set-up, make sure the BD player you choose has 7.1 analog outputs. Some only have 2.1 outputs.