Ok cool. Thanks for the feedback! I actually have an OPPO but I've never hooked up a drive to it. I like this idea though! What I do for surround titles I buy is actually record the outputs of either the OPPO (7.1) or my Marantz which has 12 pre-amp outs into ProTools (recording software) and then I can play it back and have complete control over what I'm listening to level-wise in case I want to check something out. But, that's more of a recording engineer's rig than a listener's rig. It does sound great going into studio monitors though. Then my home theater set up has Polk Audio and I have another set up of Sonys.
So... I'll have to look up the best way to actually make a 5.1 Flac. I've never done it and I don't think ProTools will export it that way. If it does, I've never done that. What do you guys use to make Flacs yourself from discrete waves (if you do)? Also, I wonder what format of the channel order it would be. There's SMPTE or DTS or a third one. I always do DTS format (L,R,Ls,Rs,C,LFE) because I use the DTS encoder for Blu-Ray.