Autocar just posted their video comparison of the three most desirable sports cars of 2008. The Nissan GT-R, All new BMW M3 and the ultimate purists performance car, the 911 GT3. No big surprises here, we’ve all seen the test and Nurburgring lap times; the GT-R is the new bench mark in production car performance. It’s bigger, it’s heavier, it’s higher off the ground, but boy oh boy does this thing handle! We can’t wait to get our hands on the car ourselves. Alas, the comparison…