Whist the Digitrains site isn't the easiest to navigate at first, it is worth searching because some of Mr Chetters sounds are awesome, so if a new site is on the way that's great news.
I was looking for an 08 sound decoder and none matched my requirements, that's because as a retired driver the sound had to perfect for me [ hard to please awkward git ]. I now have a Zimo fitted 08, with lights, with Mr C's sounds and its as near to reality as you are going to get in my experience. I also have 25, 26, 37 and others but I need a Deltic and an 87, so hopefully Mr C will have a full range soon!