Look into all the options
look into all three options to check on the hassle factor, then depending what vehicel you want decide upon 1, 2 or 3.
Factor in making your decision: if you want a Landie probably buy it here in the UK if you want a Cruiser then Oz is probably better, unless its an 80 or 100 series which are plentiful here, then you would have to see where it is cheaper to buy.
You will have to look into the price of vehicles both here and Oz, the kit to fit them out - almost certainly cheaper in Oz, stuff like ARB and OME are made over there.
So in essense do your home work and make your choice