Advice on buying a BMW X5 vs. Acura MDX

[e31]

I am researching a longer term (first priority) 4X4 and have been looking at the 2001-2006 X5 and 2003-2005 Acura MDX. Performance is secondary in this case.

Your feedback is welcome especially those who have:

--Looked at both vehicles or can advise me on buying a 2001 with lower mileage (65k) versus a 2006 with higher mileage (135k).

--Real world experience with maintenance cost between the 4X4 and xDrive will be appreciated as well.

--Any year to avoid all together

--Any good info for this X5 newbie

I drive relatively few miles (~2,5k) a year as I mostly ride my 2 motorcycles to work and on weekends all year round. (Yes, I do wear heated gear.)

My other ride is a 1995 840ci with 160k miles which I can keep maintaining and nto pursue the X5 as an alternative or replacement. I actually got home ok in the E31 during the last winter's heavy snow fall. Fifteen year in Chicago taught me well.

Thanks for your thoughts in advance. I can offer lunch or a case of beer as a barter!