The problems you read about on the forums are generally early-hour reliability issues. That is different than 200,000 mile durability. The 2009 should be more reliable than the first E70 models, but I wouldn't buy one planning to drive it 200,000 miles.

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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