Well I just got my X5 3.0si after scouting around for 3 months. Test driven the Cayenne (base 3.6 v6 model), ML350 and Audi Q7. All base models.

End up with x5 because I find Cayenne V6 drives like a truck. The engine is sluggish and underpowered. The most unrefined V6 implementation I have ever tried. Noisy even if u are sitting at the rear.

ML350 looks ordinary. No road presence. Tested it and on a straight slightly uphill road, completely puts me off when the vehicle downshifted to 2nd gear 3 secs after i floored the accelerator. Heard the roar, but the damn SUV did not move. Imagine if I need to do instantaneous overtaking on a single lane road, I may have been hit head on by the oncoming.

Q5 is nice with all the latest gadgets. My only dissatisfaction it is really TOO BIG.

So...really do I have a choice ?