BMP- be aware that while there is a large library of downloadable simulations of OEM remotes, and they are learnable as well, there is a considerable learning curve for the Pronto. Most of the controls are "soft", i.e., they must be created and programmed on the LCD for each device. I THINK that the Marantz may have a built in library of devices, I know my Pronto does not and really wish that it did. I also have a Home Theater Master 9000 which has hard buttons only and an extensive library of buit in devices, but the one I have is about 4 years old and did not have commands for my Loewe TV. They (Home Theater Master)have a web site, and there is another web site devoted exclusively to remotes Remote Central.com, with lots of links. Give it a try. If you need the url, you can email me.