Just wanted to give interested readers an update. I stumbled upon an amazing deal on an open box Marantz 6006 at Best Buy for $427. This model is very similar to the 6007. I have not had a ton of time to play with it yet, but I set it up, ran Audyssey and have listened to some music and watched a few TV shows with the new receiver. There is a noticeable improvement in the clarity of dialog with TV and movies and much more detail and "presence" in the surround channels. WIth music, the sound is more balanced with better articulation in the bass. Overall, the sound may be a little less warm than with my old Rotel 1056, but it is by no means cold or clinical. The HDMI switching works well and it has been a pleasure to get rid of some of the "spaghetti" in my AV cabinet and simplify my life. Connecting the Marantz 6006 to my network was easy and upgrading firmware and listening to Internet radio has been fun.
I hope this information is helpful to someone. I agree that with the many wonderful choices in the marketplace today, it's hard to go wrong as long as you do your homework!