I've had a 2004 E53 4.4i, and 2004 4.8is, a 2007 3.0si, a 2008 4.8i and now my 2011 35d.

To date, my favourite was the 2004 4.8is. My 2007 and 2008 E70s were awful. Electrical and computer related problems, battery issues, lighting, HVAC.

Besides from a dreaded (and what looks like not fixable) driver's seat creak/crack in my 2011 X5, it has been great. 6 months, 4,000 miles and no issues. MPG is great, LCI taillights are beautiful and the interior fit and finish is pretty good.

For me, the 2004 4.8is E53 was my best and favourite X5. Loved that car!! Miss it almost daily!