Currently I am using Direct TV and Netflix. I too have whole house HD DVR with 6 tvs connected at the house and a separate HD box and antenna for the garage.
Direct TV has the best video and audio. I can run netflix either from my Oppo BD or from my Apple TV. The Oppo didn't support 5.1 Prologic, it only worked in 5.0, which was extremely disappointing. When I launched netfilx from the Apple TV I was able to get 5.1 sound, so that is what I use.
All of my tvs are wired connections, digital off the DVRs. All of my audio devices and all connected to Apple tvs, so I can listen to music via wireless networking and or watch streaming movies via netflix. The thing I like about netflix is they usually have a movie
I want to watch before DTV does.
What I don't like about netflix is all of the video is compressed, whether you select HD or not.
If it's a good movie with sound effects I'll wait untill I can get it on DTV before I watch it. If I really like it I'll buy a blue ray version of it for the oppo player. Then I have the best audio and vidio available
HT - Sunfire TG IV, Sunfire Cinema Grand Sig. 400 x 5, Oppo 93, Klipsch LaScala (3), Cornwalls (2), SW-12, Sony 60" LCD
2 channel - AN L2 Pre-amp, Carver Cherry 260's, AN 2.1 DAC, Oppo DV-981HD, Klipsch Epic CF3
2 channel - AN Interstage Mono Blocks 300b PSE, AN Sig. DAC 3.1 , AN Sig. Phono Stage, Sota Comet TT, Lowther Medallion Speakers PM5a driver, Rythmik F15 Sub
2 channel - Carverfest Mono Blocks, Grant Fidelity DAC, Klipschorns
2 channel - Audio Note Kit 1 300b SET, Audio Note DAC 2.1, Lowther Allerions DX-65 drivers