I think that the Audiogate is the only 'real' solution for us. Sonoma, Paramix, Genex, Sonic Studio and Mykerinos support DSD but are way out of the price range.
However, I have never found out if you could transfer dsd files to the Tascam DVRA1000HD hard drive and then burn the DSF file to disc from the Tascam unit. Still the DVRA1000HD is around $2000.