is an upsampling dac necessary for dvd trans.....

Will I need an upsampling dac if I am going to use my dvd player as a transport for cd’s and dvd movies?
No. The dac will read the data as either 44.1 or 48 (for 96K) depending on whether you play cd or dvd. If you like the dac there is no need to get an upsampling dac.