Interesting on the difference in driving feel between RWD and AWD, James. Are you inclined to wait for a RWD Huracan in preference to the AWD? I found the understeer (or at least the strong self- centering) the least appealing feature of driving the G and Murci.
Not long after I bought my 05 Gallardo I had the chance to drive the 560-4 and the then-new Balboni around The Farm. I remember at the time thinking how much more lively the RWD car was compared to the AWD around the tight road circuit, and decided that for track driving (or just generally pushing at 8/10ths or above) the 550-2 was the far better car.
I took my old car to Wakefield Park and Eastern Creek a few times, and whilst there's a definite rear-drive bias when you apply power out of tight corners I'm about 20 notches of skill below Wattens or anyone who can translate that into a controlled AWD drift. What I noticed more is the extra weight pushing the front of the car into the slower corners - more noticeably into Turn 2 at the Creek or the top of the hill at Wakefield. Without driving the 550-2 I would have just chalked that up to a conservative handling setup, but after experiencing the car without the front diff I can see it's as much the extra 70kg over the front wheels than anything else.
As for the Huracan - I'm going to take a look in Brisbane on the 18th but I'm currently planning on keeping the Balboni long term so it doesn't make sense to have a Huracan and an Gallardo. I'm more tempted to wait until the second hand prices of the Aventador Roadster start dropping and try a V12 car next.