I looked at the top end Harmony remotes a few years back to replace my ailing TSU7500.

After trying them out for a few days, I was really disappointed. The functionality was terribly limited compared to the older Prontos. You can program any spot on the screen to have any function you wanted with any graphics you wanted. The Harmony remotes at that time were somewhere in between a system universal remote and the Prontos.

Now that was years ago, and your your Logitech Harmony 1100 looks like it may have had more versatility. I never tested those.

That said, expect that you will find that the TSU9600 is probably at least as functional as your Harmony 1100, and maybe even more advanced. I just picked up a used TSU9600, and I can already see more functionality than my older TSU7500 - Which could do anything I wanted for a single system remote control.