I would love to see a sound set for the HST as I'm sure it would be unbeatable from what an excellent job they've done on previous sound sets. I would love for them to make a sound set for older locomotives like 37's and 47's aswell. Maybe one day. There are other sound sets available off the net, some of which are excellent, others are good but could be improved. I haven't tried all of the HST sounds but the ones I have tried have been in the latter category.