My last car was a Mercedes -- hated it with a passion. The BMW 528i I had previously driven for years felt sturdier and safer than the Mercedes! So I chucked the Mercedes and bought the X5. What can I say that hasn't already been said? Mileage stinks but you expect that with a 4.8L engine right? Otherwise, it's a great car that drives like a sports car and yet it's luxury all the way!
Comfort access (a must!), automatic lift gate, heated seats, stereo, sports package, powerful engine yet smooth and light drive, iDrive (I actually like this a lot!). Beautiful inside and out.