Go for it.....

I like the fact that I drive the 4.8 and my wife has the E70 3.0Si with 50hp more than the 3.0i so it feels really nice. Plus , when we go out or on a road trip , we have the option of either save fuel with her's or just turn heads with mine...depending on how we feel

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His : 2005 X5 4.8is (SOLD)
Hers: 2007 X5 3.0si (SOLD)
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Retired:
1999 518
2000 323i
2002 M3 (beautiful car)
2003 330Ci