Somehow I have lost my Onkyo Remote, no idea how but it is gone and I believe the little 2 year old monster we have running around the house is the reason. So I have a TX-SR503, which I bought a few years ago and I was running everything off that remote (DVR Cable box, TV, DVD player) it was great and it could learn most anything from any component I ever had. I want it back or at least one identical. So I do a search and come across half a dozen remotes from Onkyo that all look the same. (ie RC480M up to RC515M) Does it matter which one I get? Will it come already prgrammed to run the Onkyo Reciever just like the last one? or Do I have to get the exact same model number remote to ensure it will work identically? Your help is appreciated.