If anyone is still interested, I'll share a few observations on this (Marantz SR-5011) unit.
I'm becoming more acquainted with this unit and, so far, love it. I don't regret buying it in. It's complex but does a lot.
First off, I love internet radio. Since moving from the NYC area I've been missing WQXR. Net radio allows me to access this at any time and it sounds great! I've also explored many various channels all over the country and world. That this particular tuner allows me to search by genre (among other criteria) is expanding my listening range.
One downside is that I uncovered a glitch in it's operation. Normally, when choosing the IR option on the remote, one is presented with six icons, Pandora and "internet radio" among them. Once one chooses a radio station, it becomes the de facto default. i.e, when you exit and re-enter IR, it goes back to that station. This is good but it allows you the option to "back out" to that six icon menu to choose another station.
For some reason it would not let me back out to change stations. After a call to Marantz Customer Support, who are excellent by the way, it turns out that sometimes it "freezes" and one must unplug the unit for a minute or so in order to unlock it. He said it has something to wo with a wireless connection. OK. Dunno what I did but I hope I don't do it again.
On a more positive note, I can read music from a memory stick.
I recently re-organized my computer music collection into folders bu genre, artist and album to load on a memory stick for my car. I figured why not see if this receiver's USB port will access it as well. Yep. It does. Now, I have about 6,000 songs on a miniature memory stick (memory chip?) inserted in the front panel and have access to all my digital music without leaving my chair.