Unfortunately the Denon on AC41 is out-of-stock. The Amazon site prices are still lower than my Yamaha idea and I like the aesthetics of the face plate better. But although I have no problem with factory rebuilt, I do worry about used. I don't want the dented one. The other caveat I have is lack of wifi in the unit. I'm not even sure what flexibility I would use by NOT having it. After all, these are new features to me. Option b: has some good features like the wifi, but doesn't look as good as the Denon and I wonder whether it is beefy enough for me. (I guess I don't trust a $399 receiver). But you gave me much to think about. Thank you.
Marantz it's not really a $400 AVR, more of $900 then it was new. As in power - it's has same 100wpc as your current Onkyo does. btw: Denon and Marantz are same company as in D&M Holdings.
Regarding buying used on amazon - You're not buying used toothbrush
- These things is most likely new items which had issues with external packaging or at worst customer returns. Amazon inspects them and like I said, "used" unlike "refub" - makes you eligible for full 3 years warranty service.
If you're IT pro as you say, then you won't worry about lack of wifi port as you could easily get wifi bridge if ethernet is not option or just get amazon fire TV (or stick) or a similar media client.
As for network capacity - don't worry, you can stream full Blueray - 1080p video with HD audio over 100Mbps ethernet no problem.
