Top to bottom:
CR-N755 (Left) UP-HD1 HD radio module, UP-A1 dock (right)
HT-RC180 (like a TX-NR807)
I'm looking to add a TX-NRX05 model receiver, and one earlier model too. Also looking to add an Audyssey Pro capable model. I'm quite likely going to get rid of the 626 and buy a 1000, 3000, or 5000 series receiver if any of them are Pro capable. I base my purchases mostly on the capabilities of the receiver and the fact I cannot wait too long to get one once the new models come out.