It appears that the PDP-570HD can be had for the same (or even lower?) price as a PDP-507CMX plus a KD card. I have been following this thread on the 507 anticipating using one in a rec room for daytime TV viewing (night viewing will probably be a projector) since I won't have a need for either a tuner or for speakers. I have the impression, however, that use of the digital cards may be an unnecessary hassle. Given a near equal cost and the fact this TV will be used only for daytime TV viewing and some computer work can anyone elaborate on the benefits of either of these units compared to the other. I believe this was one of the questions posed by the OP, but I am not sure I saw a clear answer. I may have missed it.