OK, this is helping me too.  I am looking at upgrading my HT system.  I plan to do it in steps.  First step, new speakers, including sub, for maybe $2,000 or so.  SWAG.  Although I wonder if I'd do just as well spending half as much.  I plan to move to 7.1 from 5.1 also.  Next step, perhaps a few months later, new receiver.  Or is it better/less expensive to buy an all in one package from someone?  I've generally viewed "packages" as rather low end, but I see I could be wrong.
So what do you get by moving from a three or four hundred dollar receiver to a one or two thousand dollar receiver?  Wattage, to be sure.  Maybe built in sat radio (not interested).   Is there really much to be gained by spending 4 or 5 times as much?
I see some offer networking- looks interesting, is it really useful?
And HDMI switching- sounds great to me, because my HDTV has only one HDMI input.  But I'm reading some TVs don't work with HDMI switching.  Any knowledge about that?
TIA.