Hi, i am trying to get a possible set up for at least 16 analog outputs, and i wanted to know a few things.

1) Analog expansions, i read that there are additional 4 TRS Stereo outputs. Is it a Balanced connector only(4 balanced channels), or Stereo output(4 unbalanced pairs = 8 channels)?(its quite confusing in the web)
2) Can you get 2 analog expansions of the same type, like 2 outputs expansions, or you can only use 1 I and 1 O Expansions?
3) Can you connect 2 HDSP Cards to the same computer to get more analog outputs?
4) Using Cheap converters, with RME WC, will be there any audible difference between RMEs analog output vs cheap DA conversor(like Digimax or ADA8000)?
5) Is there any sound quality difference between 9632 and HDSPe AIO?

Thank you!