If you are shooting to use the cable box only, then perhaps running HDMI to the receiver with digital audio through Toslink and the HDMI through a splitter (1x2). Your surround sound will have to come from the digital audio connection, not HDMI, as the EDID will force the cable box HDMI audio down to stereo, but the toslink should still provide surround sound. This way you get a HDMI connection straight to the TV, which you will need to do through a separate HDMI connection, or by using a HDMI switch (good universal remote necessary!). It ends up being somewhat convoluted no matter what. In my pretty little Crestron world I would just program a switch after the A/V receiver to jump between the HDMI connection from the A/V receiver and the HDMI connection from the cable box after a splitter. One input on the TV is used, and the remote handles as the switching necessary.
Of course, in my world, we also ALWAYS use the A/V receiver... always. Since it's no more complex to use the A/V receiver than anything else because the remote control makes it easy to use, it has rendered the TV speakers completely pointless.
