Only problems with the Tascam DV-RA1000. Already the second drive inside, and still problems during recording. Error 61 all the time. This machine is crap, only it's AD and DA converters are excellent and that's how I use it. I can never trust this machine, it just stops recording in the middle of a take. The best is to use all the time new DVD's, and as soon as you reuse a disc, it's trouble.
I made wires so I can use my Genex 8500 for recording and use the AD and DA converters of the Tascam DV-RA1000 for DSD.
The user interfaces of the Tascam DV-RA1000 is the most stupid I have ever encountered on a "professional" machine, probably written by a trainee. When I want to change from format, I need to do that with a DVD or CD inside. Otherwise I cannot change any format in the menu. Not to talk about the amount of times you need to push the cancel button, to open up the menu, to be able to change from external to internal clock, when no clock is activated from outside.
When I record CD-R's on the DVRA, everytime I make a new track ID, it mutes the signal, this is unusable and unacceptable. For me the Tascam DV-RA1000 can go in the garbage bin except from the converters.
A pity Genex got into trouble, probably they produced the best professional machines for multiformat use. I own two of them since 2000, and I hope they will last for another ten years.