The ET-8550 can print to optical media, yes, as can its little brother, the ET-8500.
There are lots of positive reviews of the ET-8550's print quality to be found on the Internet, and my opinion is consistent with those – its output is quite good (for photos; at or even a smidge below average...
This is a long shot, but I'm in the UK, looking for this guy:
The longer version of the story is that I want to print onto some CDs, I'm already using HP 344/338 cartridges in my Officejet k7103, and a very cheap D5160 is on eBay, but it doesn't include the media tray. Hoping someone here...