I'm in the market for a new SUV and have driven a variety of 7 seaters, but like the X5 3.5D and Q7 TDI Premium Plus the best. I'd like to go Diesel for two reasons: lower emissions and better fuel economy. I'm on the fence at this point...love the driveability of the X5 - just begs to be driven hard, while the Q7 is more of a family SUV. Any one have experience comparing the two and which did you choose and why? The only hesitation I have with the X5 is the cargo space compared to Q7. If I go X5 will do the Sports Activity PAckage (love the 20" wheels)and if go with Q7 will add 20" to it as well. Any thoughts? Thanks!