I'm not a Nero salesperson, nor do I play one on TV, but according to their site:

"Blu-ray Disc compatible applications already found in the Nero 7 (and above) software suite today include Nero Burning ROM and Nero Express, which enable Blu-ray Disc data recording on BD-R/RE media and the creation of 1:1 copies of any unprotected BD media."

.......Which I interpret as no quality loss or re-encoding. Could be wrong and the menu capabilities are not described very well other than "Hollywood Quality." The video samples of some of their menu possibilites look pretty good, though.

Edit: I'm not seeing DTS as a supported format here, so it could be a dead end:(