Being in the fortunate position of owning both a 3.0l X5 Sports and 4.8is X5, I sometimes drive the 3.0 It is very noticeable how superior the 4.8 air suspension ride is in comparison to the other models.

It seems to absorb impacts better when going over eg steep speed humps whereas the Sports seems to jar you with the firmer suspension.

Can't speak about the snow as here it has been averaging over 100 degrees recently.

Good luck with the buy......

PS. If you don't bow to the pressure tactic, and wait another month, is the world going to end? IMHO take your time and be really happy.

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2006 E53 X5 3.0D
2004 E53 X5 4.8is
2004 E53 X5 4.4 Sport
2011 E70 X5 3.0D with Aero kit
2009 E71 X6 50i Sport
2009 E70 X5 50i Sport
2007 E60 540 M Sport LCI (All time favourite car)
2007 E70 X5 4.8i Sport
2005 E53 4.8is
2003 E53 3.0 Sport