Save $100 and get the HP DeskJet 952. It is the same printer as the 970 but does not include the duplex unit. If you really need double-sided printing capability right now, then get the 970. If you go with the 952 you can always add the duplexer later. Or, you can do what I do and print pages 1,3,5,7,9, etc and then refeed the sheets and print 2,4,6,8,10 etc on the back sides.