Hello, I would like to suggest the Metro-cammell traction motors for the BR 465 since is in prodution for Southeastern High Speed. I suggest this version of the traction motors because is one of the best and satisfying sounds in British traction and the commumity would really enjoy the Metro Cammell traction motors!
Actually the engine you're referring to is made by GEC Alstom, and is indeed installed on Met-Cam units. But yes, it is simple: if they don't use that sound, many people (including me) won't buy the DLC.
I expect the Class 465, should it be released, will be the BREL or ABB version as they only need to modify the Class 395's sounds for it. They won't make all three versions. Never in a million years.