Nice choice no doubt in my mind but the double locomotives reminded me of the broken sound engine TSW has. Basically when you have 2 locomotives, you tend to hear this "jet whine" sound where the sound engine craps itself so the two locomotives that are diesel don't sound natural anymore. This problem exists with all double joined locomotives even the BR 204. Its going to ruin the experience.
Dont know for certain, but maybe when we use these on future routes, on a new game engine. The sound will be better.