All DVD recorders look for and will detect (and falsely detect!) anti-copy signals from input sources, such as Macrovision.
Most of them are sensitive.
A good list of
LSI-based DVD recorders can be found at
http://www.digitalfaq.com/forum/show...pset-1558.html
It's not complete -- some JVC and LiteOn models are missing -- but it's pretty accurate for other brands.
Note that having LSI alone doesn't make it a good machine. Some machines, like the Panasonic ES20, were stocked with an LSI, but the settings used by the deck were terrible. LG was like this on most models. The Polaroid was nasty, too. Apex and Ellion looked okay, but had other major issues with the units.
Look for Zenith hacks, for the LSI models on that list. Some friends of mine had used the Zenith decks, and I believe there were some hacks available. Again, having to recall 4-5+ years ago, memory a bit fuzzy that far back, this specific.