LG seems to have the market on the HDD DVD Recorders, although there are also some Samsung and Sony models out there, but scarce. DVD-only recorders are more plentiful, but can be problematic for the older generation...
Also note that LG optical drives are problematic, with many people complaining that they die and need replacing every 6-12 months - I'm on my 5th replacement drive already, in 3 years...