I can get the Harmony 520 for 69.99 before taxes at Costco or I can get the harmony 550 at Best Buy for 89.99 before taxes. Money is tight at the moment. I'e looked all of my components, satelite box, dvd player, a/v receiver, tv, cassette deck, and cd jukebox and all are supported by these remotes. I don't use the CD juke box to play CDs. I use the DVD player instead. Should I stay with the 520 as my preferred choice?