Hi since the company I work for here in Sydney Australia (Independent Rail -
I've had some limited experience with the LokSound decoders and I think they're an excellent product which eats any of the SoundTrax, etc. decoders for breakfast. 8-) Can't comment any of the QSI sound stuff at the moment.
My plan is to modify the locos to look like the series-3 ones, perhape re-painting them silver like ours are and maybe even arranging to have special Independent Rail logo decals made up. If any of you frequent my railway image collections on flick.com or railzone.org you'll have seen plenty of pictures of the MZ's from my day-to-day involvement with them, so I think they'd make a very interesting subject for Australian-prototype 'conversion'!
Regards,
Craig.