Imagine GT5 with audio like this! That RAW power! How the engine just screeaams when hitting high RPM's, the thudd of the gears kicking in. How the gearbox whines seperate from the screaming engine. Not just one big blurr of whine like in all GT games since GT3. oh, and don't miss the tire screech at 1:15. 
http://www.gametrailers.com/video/pagani-huayra-shift-2/710710?type=flv
http://www.gametrailers.com/video/pagani-huayra-shift-2/710710?type=flv