Well, at first glance, the obvious choice would be the Sony 2000. The problem is, the DA50 and CX88 both use the newfangled bidirectional remotes. And unless Sony comes up with something that works with them, I would say the best choice would be the remote that came with the DA50, since the system _is_ all Sony, afterall, and to my understanding the MegaStorage stuff works properly on it as well.