Value of a digital receiver to cable subscibers?


First post here :)! Quick newbie question. I’m considering a Panasonic DVD/HD recorder and looking at the DMR EX87 and DMR EH57 models. The main differentiator seems to be that the EX87 has a digital TV receiver built in. My question is how important is the digital receiver to me if I get most of my channels from a cable subscription via a decoder anyway?