Thanks for the feedback guys - bit the bullet on the B9, and definitely not looking back. Higher mileage, but got the Audi Factory Warranty extension as opposed to an Autosure warranty on the B8.5 - which I received some mad quotes on!!!
Standard features were much more than I anticipated (Nappa Leather Electric sports seats with Heating and Massage Function, Surround View, ACC, HUD, Google Nav, VC, DCC, Keyless Entry). Options that were checked on build was V-Spoke 19" Alloy's, B&O and Matrix LED Headlights with the High-Beam assist which worked beautifully on the trip back to Wellington on Friday night. As much as the B8.5 would have made really good power with a Pulley, Intake, Software and Exhaust, the B9 is just miles apart in the tech arena and I've enjoyed my time in the cockpit on the weekend. 034 Motorsport tune seems to be getting some good results with folk in the US so will look into that at some point once I've grown tired of the standard 260kW. The 8-speed ZF box is much smoother than I expected it to be, especially in Dynamic mode.
My only issue so far is the Traffic Sign Recognition (or lack thereof) in the HUD and Virtual Cockpit which i've gotten used to while driving the wife's B-Class, especially on less familiar roads. Small price to pay, considering everything else it has, and final price being 5k more than the lower mileage B8.5 option after adding in the warranty.