I know this is almost 2 months old, but I just wanna let you know that I did end up buying the Pagewide 477dw and I've been using it for just over a month now.
It replaced 2 devices in my office (Officejet Pro 8500 multifunction, and Officejet Pro 8100 printer). These were both more home office type printers.
As noted in Tek Syndicate review, there's the full ream paper tray which is really nice. For me this means we are only refilling the tray about twice a week instead multiple times a day.
I also really l like that it has the separate tray for envelopes or one off jobs. This is really great because in the past we'd have to change the tray whenever we needed to do special jobs like printing off a batch of envelopes or labels. Now tray 2 stays fully loaded with copy paper, and we use tray 1 for the one off jobs like label printing and envelopes.
The document feeder is leaps ahead of the traditional consumer/home office multifunction printers.
By comparison on my OP 8500 MFP, you could scan a 2 sided document but it would have to flip the document in order to scan both sides which would often jam and ruin your batch job. On the Pagewide, it scans both sides simultaneously. That's a huge time saver. But it doesn't stop there. The document feeder scans pages about as fast as it prints them which is also a significant performance gain for me.
I don't fax but we scan to email and scan to copy a lot and this document feeder is top shelf.
I never install drivers from the CD. I always just let windows autodiscover and install the printer. I know this means I will lose out on some features possibly like performing some scan operations from my printer but that's fine by me. All my scan/copy needs are perfectly suited by going to the device, and since it prints so fast it's no hassle.
HP has the best web interface of all printers I've used (except Xerox). Epson and Brother dont stand up by comparison. This makes configuration a breeze for an admin that doesn't want to configure using the lcd. Also handy for when you want to fill out the address book.
The only 2 downsides
1) OEM Ink is expensive. (I plan to refill and have an warranty with accidentals just in case)
My ink supplier told me the pigmented formula is the same as we had been using for a different printer so my ink savings will basically pay for the printer in just a few months.
2) The email address book is limited to 15 address. HP Are you efing kidding me? wtf. This is quite literally less than 1KB of memory for email addresses. However, there is a silver lining for bigger organizations because it does support LDAP.