All you need to know
http://f80.bimmerpost.com/forums/sho....php?t=1084623
Oh and residuals on the 2015 are 53/55/56 (36 months 15K, 12K, 10K).
And your taxes... I think Texas might still be one of the states that taxes leases on the price of the car - so you would add your taxes to the purchase price if you will (cap cost).