When I first started looking at the X5, the difference in lease payments between the 35D and 50i were marginal. Even though the the difference between the MSRP on the two were substantial.
The 50i suits my driving style better, so thats what I went with.
2013 Carbon Black X5 50i M-Sport
2010 Alpine White 135i M-Sport
2010 R1200GS Adventure 30th Anniversary Edition
2010 Carbon Black M5
2007 Graphite K1200GT
2003.5 M3 Cabrio
1997 M3 sedan