@amp
Honestly, spend some time with the McLaren.. It felt fun but weird to start with to me, until i realised i was completely over-driving it.
Take it to Mugello, drive it really smooth, start by braking early,let it roll into the corners off the power, really gentle throttle control out of the corners... build up slowly over a few laps. When you drive it like it wants to be driven it handles wonderfully. Overdrive it a tad too much and it's horrible, Keep building it up slowly to its limits and it rewards you with massive laptime improvements and it feels great.
I wasn't sure about the MP4 at all to start with...it felt wrong. After 5 hours with it I'm convinced its one of the best cars in the sim.