You don't say anything about your intended use, so impossible to pick.

Do you tow significant loads? Do you need 7 seats, even if a few of them are for small children and it results in less luggage space? Are you alone in the car most of the time?

I would be shy of the first model year. X3 looks interesting. Probably X1 for me next.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue