Many different opinions and need some help

[katiehlvr1]

Hi all, I have done hours of researching this. Even called up Samsung to try and get an answer here.
Let me first start with my system.
I have a 42 inch lcd that all components are hooked up via HDMI for tv audio and video picture. Here is my real question.

I have a receiver hooked up to my bluray using digital coaxial. On my samsung bluray player it asks if I want pcm or bitstream. Do I need to set this bluray to play Bitstream or Pcm? I am getting one answer from one person and another answer from another.

I just know that the BR discs have many different sound options. TruDD, DTS HD, DTS, DD 5.1 etc. I am looking to get the best sound out of the player and have everything setup correctly just trying to get a definate answer as to if you have a receiver that decodes these muliple formats and it is hooked up with an audio coaxial digital cable should I select PCM or Bitstream on my BR and other components?
I know many many people have this question but I just keep getting mixed signals like i am running in a circle. With a receiver that decodes and a br player, hooked up voa digital coaxial should i set this BR on Bitstream or PCM?
Please can anyone set me straight with a direct answer?
I would greatly greatly appreciate it as I am getting very worn out trying to find this what would seem to be simple question. The tv is set. All hdmi cables going to the componets for picture and tv sound. Just need to know what setting to put this BR on PCM or Bitstream.
Thanks
Corey