Imhififan, I see a lot of debate in the forums about being able to use a splitter (even a 3D one) to pass 3D video to a monitor and Hi-def audio to the receiver and everyone seems to be saying that it doesn't work.
Have you actually tried it using a Blu-ray with HDMI 1.4 and a receiver using HDMI 1.3 and got it to work for both 3D video and the advanced audio codecs???
For me the easy solution would be simply to buy the Sony S790 Blu-ray player that has both an HDMI Video output to the TV (for 3D) and an HDMI Audio output to the AVR that will do the advanced Dolby and DTS codecs. But since I have only one Blu-ray disc with 3D video so far it's not that big of a problem.