Terry,
Many Thanks for taking the time to provide the advice. 
We don't know much about Units Trust, so will need to research a lot more. If we sell to a unit trust, do we to pay Stamp Duty?

Your advice about SMSF is quite attractive to us as we have a SMSF with me & my wife as members. If our SMSF has enough cash to pay for the market value of property A, do we allowed to transfer property A to our SMSF? and would Stamp Duty be exempted as the SMSF belong to us?

We're trying to find the best way to keep property A, because it's a house that we want to live in when we retire in about 10 years.
Thanks again for your time.