I had no idea that this problem is not technical but as Gavtec says its to do with licence cost for each encoder, this all sounds like the fat cats are holding back the technology through moneytery greed, when you think about it, it still dosent make sence because when you think of a mobile phone which can do internet, satnav, mp3, mp4, camera etc etc... that means theres several encoders and decoders built into each unit, so howcome they are so cheap to produce and buy.
If they can clearly see that their is a market for dual tuner hdd dvdr recorders then why don't they grant a licence for twin encoders, even if it dose cost more than a single encoder pvr, surely we are all willing to pay that extra amount? like its been stated, they will be cheaper than a vhs was 20 years ago, and today we have higher wages than we did back then so we can even afford them!
the only reason why i want a combi, and not seperates is for fast speed transfer to dvd, as a seperate dvd recorder would only do this in real time with ananalog link.
also transfering to a pc (this is what i currently do with my Topfield) to proccess by the pc then burn onto disc is a laborious job too.
please excuse my bad spelling!