DVD players doesn't allow for recording. DVD recorders do, though most of them are nothing more than what your VCR does. Some do have VCR-like functions with recording on a timer, and some of them also have internal hard drives, for DVR-like functions.
Cable companies and satellite companies offer their own DVR's, which normally allow for dual-tuner recording, so you can record two shows at once. Plus, they're HDTV-ready, so you could use it to get HDTV channels if you have HDTV's. It would replace your existing DTV's, on a 1-to-1 swap. There's a monthly fee for each DVR you have with the cable company.
You could purchase a Tivo, which is a DVR, though not tied to a specific cable company. The one I'd recommend would be the Tivo HD, which allows for dual-tuner HD recording, though you'd need to get a CableCard from your cable provider, so you could record encrypted and HD channels. It allows the Tivo to access all of the cable channels and you wouldn't need the DTR anymore, with the CableCard installed. The Tivo allows you to do more than just DVR functions, as you can copy shows from one Tivo to another via a home network, you can rent/purchase TV shows and movies from Amazon Unbox, watch Youtube videos on it, pull music and photos from your PC, and a number of other options. Plus, you can pull shows from a Tivo to your PC and burn them to DVD. There are older Tivo's that don't so HD recording that have built-in DVD recorders, so you could dump the shows to DVD directly on the Tivo. Toshiba, Humax and Pioneer made all those types of units, though they're no longer being made. Plus, there's a dual-tuner Tivo that only records SD content, though you'd need a cable box to get any digital or encrypted channels, and it would control the cable box via serial or IR connections.
Info about Tivo is here:
http://www.tivo.com/whatistivo/tivois/index.html
You can go with TV tuner cards in your PC, and if you have Vista Home Premium or Ultimate, you already have the DVR-like functions built into the OS. Windows XP Media Center Edition also works as well for that. TV tuner cards also usually come with their own DVR-like software, though how good they are can depend on the TV tuner card.
Plus, you can get the Tivo experience on your PC with the LiquidTV TV tuner that just came out. Product page:
http://www.nero.com/enu/liquidtv-introduction.html
Review of it here:
http://www.pcmag.com/article2/0,2817,2331277,00.asp
[quote name='Immortal fWd']This. If you have cable, the DTV transition does not apply to you.[/quote]Actually, it does, just not until 2012, when the cable companies have to go all-digital or provide converter boxes.
Here:
http://arstechnica.com/news.ars/pos...e-you-must-support-analog-tvs-until-2012.html