Alright--For those keeping score.
Over the last couple of days I've been running our 7.2 Klipsch Library Home Theater with a Denon AVR-4311ci to replace the AVR-4806. At first I thought maybe my system was being underpowered, but found my initial impression was because I was listening to bright material after a long day of setup.
Yesterday and Tuesday I had 4 different listening sessions where I played action scenes from my favorite movies at near Reference level (-6 to -3) and felt dialog improved amongst the explosions, gun fire and other action, which is an improvement in both volume and clarity...After action movies on both days, I enjoyed a few ales as I enjoyed my music collection but found the only thing I don't like so far (or haven't figured out) is that converting this material to 7.1 wasn't as sonically pleasing as with my AVR-4806, but SACDs DVD-As sounded excellent in their native format.
Within the next few weeks I am going to try Front Heights to see if it adds anything, but so far I can't imagine it can improve that much.
Fwiw, I would call AVS to see if they have any AVR-4311CIs left in stock and if not call Chad at ONECALL where I picked mine up cheaper than it's advertised on E-bay or Amazon...This was my first major internet purchase.