We're thinking about getting a dvd recorder for our family room. We have Comcast On Demand (black box on top of tv) and I know it has a tuner, therefore we don't need a tuner in the dvd recorder (at least, that's my understanding). Does it make any difference in how things work if we do get a dvd recorder with a tuner? I know that this recorder will, at some point, be demoted to the basement for the kids and we only have cable (no box) down there and we will need a dvd recorder w/a tuner. Just trying to think this out for down the road. Thanks for any info.