That's a hot topic - DSU vs DTSNXU (freaking mouthful!
),especially with Dolby now restricting the upmixer.
I have't tested as many movies as you have, but for me I prefer DSU for 2 reasons:
1. I can actually HEAR the surround effects more prominently and center dialogue more clearly with DSU than with DTSNXU, especially for watching TV shows that are in 2CH.
2. I love saying "DSU" because it's so sweet to the point. I hate saying "DTS-freaking-Neural-X" Upmixer!
Couldn't they just say "DTS Upmixer" and we can call it "DTSU" ?