I drove an X6 50i. I first drove a 2010 X5 4.8i, and then the X6 50i, back to back to compare. X6 is basically the same from the front seat forward. Same motor and hp, and about the same weight. Loved the power of the 4.8. But the 4.4 twin turbo is tremendously stronger. It is a true low 5 second 0-60, maybe faster! It is pretty darm close to an X5M. Night and day over the 2010 4.8i, of which I had an order, cancelled, and ordered the 2011. I ordered a 50i in sparkling bronze with cinammon brown leather interior, 20" 336 rims, with most options. Mine is completed and being shipped now. I am in LA, and told I will recieve it in 2-3 weeks. That is if there is no delay in the shipping process. I will snap pictures as soon as I get it.