It's pretty...boring.
IF I had the funds for a vehicle in this bracket, I'd opt something that isn't so...cliche.
Porsche 911 GT2
Mercedes SLS AMG
Hell, I'll even throw in an Audi RS6 Avant on the list too for shits and giggles. From what little I read about the Huracan, it's essentially a Gallardo with new body panels. 
new chassis, and sports a DCT transmission, whereas the Aventador has a single clutch transmission.
As far as the engine, I don't know...but from what I've read it's either an overhaul of the current engine, which was Audi designed in the first place, which means the next R8 will get it, or that everything is new except for the block.