Adrian:

This isnt going to answer your question directly, but I use the 950/770 in 5.1 mode: I split the L&R front signals and use 2 extra channels in the 770 to bi-amp my mains (PSB Stratus Silver i - GREAT speakers!).

That means the mains consume 4 channels on the 770, but gives me unbelievable dynamic range on the mains (600+W per channel at 4ohms); and there are enough remaining channels to drive my center and 2 surround channels. In fact the dynamic range is so great I have found that I do not need a subwoofer (this in a 20x25' room!).

So technically I am running 5.0. The 950 took a bit of tweaking, but does a great job of adding the ".1" LFE channel into the mains on DTS and DolbyD signals. I also configured my SACD/DVD-A player the same way so even the mulitchannel inputs are configured the same way.

BTW, I would recommend that if you do get a sub that you buy a powered one.

I have been incredibly happy with this purchase; the value of the 950/770 combo is without peer!