Another real advantage to ImagePrint is that it allows soft proofing of gray scale images using their excellent gray paper profiles. Soft proofing can be done either within IP or Photoshop, which is my choice. This is not possible with ABW, at least on a Mac. (I'm not sure about Windows.) ABW is a bit of a black box. You don't know what a print will look like until it comes out of the printer. I use IP on a 3880 and am getting the best B&W prints since I started printing. I consider its cost to be money well spent, but that is for the smallest size printer that the software supports. I truly don't understand the justification for the progressive pricing structure, but every potential customer has to decide whether it is worth the expense.
Rob