I have one of each (a 2.5 X3 and a 4.4 X5). X3 owners are passionate about their vehicles because they're the best handling SUV's on road... the "Driver's Car" of SUV's.

Nothing against the X5, it's a great truck, but I have way more fun driving our X3, plus it has more cargo, head and leg space than the X5, all wrapped up in a sportier package. Around here the X5 is piloted primarily by soccer moms. The people who love driving go for the X3.