I read a discussion on some other board that due to a higher residual value set by BMW financial on X5, on a comparably equiped X5, even though the final price is higher than a 330i, the X5's monthly payment is actually lower than a 330i. For a X5 3.0 with 36 month lease and 12K miles per year, the residual value can be as high as 70%. Is that true?