Which would you choose? - X5d vs X5 50i

[F150 Duke]

Which one would you pick? They are spec'd out nearly identical but the 2012 X5 50 would not have the Nappa dash or Tech Pkg (HUD, Auto High Beams, Side-View). Both would be great for towing the boat 6 months out of the year, though the V8 would probably be a bit better. Then again the diesel MPG average of approx 21 vs the V8 MPG average of 16 would be really nice to lower annual fuel costs by about $600 per year. But the quieter sound of the V8 and lack of having to smell diesel gas at the pumps would be nice too.

2011 BMW X5 Diesel - $70,083 after TTT and Eco Credit
· Cold Weather Pkg
· Prem Pkg
· Prem Sound Pkg
· Tech Pkg
· Rear Climate Pkg
· Sport Pkg w/ 20" rims
· Multi Contour
· Comfort Access
· Roof Rails
· 3rd Row
· Side View Camera
· HUD
· Nappa Dash
· Auto High Beams

or

2012 BMW X5 50 - $71,946 after TTT
· Cold Weather Pkg
· Prem Pkg
· Prem Sound Pkg
· Sport Pkg w/ 20" rims
· Multi Contour