The Epson 3880 may be the right choice. It can print Borderfree down to 4" x 6" and 5 x 7, 8 x 10, 11 x 14, 13 x 19 and 17 x 22. It has a straight feed path and can print on substrates up to 1.5mm (.059"). It is a very versatile printer that would complement your 44" HP. Oh, and the inks are archival and Epson has the edge on media handling, IMO.