Brian: i wanted to get a unitized system and go HT; at the time Theta didn't make an amp, Proceed had the works. I tried out the the Theta david and Gen V dac, Krell pre, Krell amp system that i was using vs the AVP, PMDT and AMP5, and damned if the proceed combo didn't sound better; was able to do it all in my home,with my speakers (watt puppies).
Had a mysterious problem with the david, sent it in for successful repair and was told they found a glitter-like substance in the drive, cleaned it up and it worked fine. no problems after that.
regarding the progressive scan, given that you will have the Native Rate, you don't need it.