$35 sounds awfully cheap for a filter that will work on DVDs. Usually the ones much less than $100 only work on VHS tapes, you'll definitely want a conformation that it will work for DVD.
Depending on the quality you want the DVDs to have if you wanted them to look basically like the original I'd look for a Panasonic. If you didn't need the digital tuner and wanted something new I'd look for a tunerless line input only Panasonic EA-18, Target sells them for ~$179. If you wanted a digital tuner then the EZ-28 Panny would include that, although it seems to be more buggy/flaky than the tunerless EA series.
If you wanted to go used the analog tunered ES line is quite good and makes the same great quality copies. The ES-15 was a '06 model and works quite well for a slave machine.
Pannys will make very good recordings up to about 3hrs/single sided disc. Double layer discs are more problematic and I'd really advise against them unless for very long programs and then only on the EA/EZ line.
Note no DVDRs will record in 5.1 audio, you'd need a computer and program to do that.