Sorry, maybe i've got the wrong end of the stick here but, to convert a DIN valve to take yoke - otherwise known as A clamp- regs merely requires a small adapter that just screws into the DIN valve ? The result is exactly the same as a normal yoke configuration. It is the other way around that requires the addition of a large and expensive adapter that increase the size of the whole 1st stage assembly.
Personally, I've got DIN valves and regs. the main advantages for me are: only one O ring required no matter how many cylinders i'm using over the day, a much more secure fitting, absolutely no danger of knocking it off passing through a tight space etc. The only possible disadvantages are: possible incompatability issues with Yoke valves when travelling, the possibility of jamming the reg into the valve if you hit it hard enough when passing through a tight space.