The dvd recorders are nice but I would recommend a TIVO first. I’m setup with both here. But I mostly record my things on the tivo then if I really liked it I will record it on a DVD. The tivo is more like an hard drive so you can record and remove tv shows and movies with more ease than a video or a dvd recorder. You can buy DVD re-recordable but you often have a couple of operation and I’m not sure if you can only reformat one part or have to do it all.
With a dvd recorder when I fast-forward too fast it sometime skips and goes back to the start. You can make menus but the scene skipping is not that great. Maybe its just my recorder thats not that good but it happens.
It’s better quality but if you’re not too tech savvy it can be annoying at times.
For recording the commercials, there is no real way to skip those except watching the shows while they record and pause/restart when they occur. Don’t get tricked by the “skip commercial option” that some recorders may advertise. Its often just a button that fastfoward 30-60-90 seconds during playback and it doesn’t stop when the commercials stops but when its time is up. So you have to rewind back a bit. I would be surprise if the networks would let some machine that can skip be sold since its their main source of money. I’ve notice some of them even make their show last 1-2 min after the said time of recording so you’re always missing the end.
I love my DVD recorder for archiving stuff that I really want to keep witch is not that much. But mostly I use my TIVO for every recording.
I hope it helps
edit : for DVD brands I didn’t find any distinction between the generic dvds at like 20$ for 50 or the ones at 10 for 25$ I’d say its pretty much the same. Except maybe you will have one fail at format but at those price you throw it and take another. Some of the generics ones I had for a few years without any casing and they are still working fine.
Edit 2 : I don’t have a TIVO but a tivo-esque thing doing the same thing. Recording shows from the tv schedule on it and it records the show on a hardrive.