See if you can find a One for All that is upgradable. It's normally touted on the package. The newest remotes will have more of the codes already in the remote.

If you are running more than the TV, a higher end remote will let you run everything and make it easier to run.

I don't recommend buying a factory remote because of the cost is usually than buying an aftermarket remote with more capability.

You could buy a better learning remote from a AV store and test it at the store and learn the codes from a newer panasonic on the floor.

At least the dog didn't eat the computer controlled remote that my customer bought...twice!