You might be more specific as to how you will be using the printer-
How many photos do you print? What size? Does double sided printing matter? What about printing to the edge and on what size? fax? PRinting straight from camera or memory card?
The 6500 does not include an LCD screen (which I like) as I never print straight from camera or memory stick and rarely print pics because I can print them cheaper at a photo web site or local store than any printer can print them. In addition the inks don't fade on pics from a photo finishing store/website vs. printer. So for me an lcd screen was unnecessary and I wanted automatic two sided printing (note- not all are automoatic two sided- some say two sided printing, but you need to manually re-feed the paper through the printer) The 6500 is automatic 2 sided printing and has a document feeder which is nice to have.