Bored, Peng and Rasta - Thanks for all of your suggestions.
Bored- I really do want USB Type A for flash drives and external hard drives, and I want to keep my 2-channel setup simple, so no TV. That leaves out Sonos, although I liked what I saw for the price. And, thanks for the educational link on frequencies and bitrates; enjoyed reading it and learned a thing or two or more. I always wondered bout those frequencies beyond my auditory range.
Peng - The Marantz hit it on the head and is now on my list. The Denon doesn't have a type A USB, so that's out.
Rasta - I do want to keep my 2-channel simple, so there will be no TV option.
OK. So far I have Marantz NA 6005 and Bluesound Node, which is a new device from NAD/PSB. There is a Pioneer N50 that is not available in the US but is similar to the Marantz and has had good ratings. I like the fact that Marantz and Pioneer have remotes, so I don't need to use my phone or ipad to select music (Bluesound Node), but I like the price of the Blusesound Node. I will post when I make a decision, but any other suggestions are welcome.
Great site. Love the support.