The downside to replica wheels is that they are often heavier (lowering performance), they can be more fragile, and they can have less quality control, resulting in out of balance and out of round products that result in vibration issues no matter how many times they are balanced. You tend to get what you pay for. Yes, OE are expensive.

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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