It certainly makes sense that it would be Aster. Their past products have been more aligned with the UK/European tastes than American. And, given that so many of their previous locos have been alcohol fired, it also makes sense that the people responding to an Aster survey (i.e., current Aster owners, I suspect) would prefer what Aster has already made. It would be really interesting to see the same survey conducted by Roundhouse or Accucraft.
regards, -vance- Vance Bass Albuquerque, New Mexico, USA Small-scale live steam resources: http://www.nmia.com/~vrbass