Johnny, just replying on 907 Duck duct, I personally like the look of the 907 duct but it is all personal, that duct on the Brocky had me going for a minute, before reading text I thought someone had filled and moulded a 907 fairing.
I basically chose the 907 over the others due to it being the last of the lineage, and that i felt most issues are well sorted by then. I liked the idea of the fuel injection and tourability plus the fact that it only had 10.000kms and it was $8,000.
It was also fitted with staintunes ,givi topbox and the fuel chip to suit the greater free flow exhaust system. Though my primary reason for buying a Paso was because of the love of Tamburinis design. Got the red one.
I also (as you) , did a lot of research prior to purchasing. I had seen a real good looking black 907 in perth with 18,000 kms, (Love that black look) and I was in the same position as you, re; ability to see bike , transport and logistics (expenses) related to a buy from the opposite ends of the country.
Far as I can see you will end up with what you wan't, take time and you will get the one to suit you needs, If you buy from the East you may as well come over Tassie while your here and give some of our corners a caning,she's agreat place for a Paso, I'll keep a beer in the fridge for ya , as you will be a bit dry from the exhiliration factor.

Best of luck with it....Marty