We are not yet at the buildout phase for the E70. That is when BMW loads the incentives (if necessary) to drop inventory levels. Currently the E92/E93 are in buildout, and have a $1500 lease credit to help things along.
The best deals are those negotiated with a dealer. I see you are in CA. You should contact Jon Shafer at BMW Santa Barbara, he is the founder of this website and a great CA!
The best lease deals are going to be on the 35i and 50i. The residuals are much stronger, although I would also run the numbers 35d to make sure as you do get a Eco Credit from BMW on the d.
2014 BMW X5 xDrive 35d- Space Gray-Canberra Beige Dakota Leather-Fineline Oak Wood Trim-ZDA/ZCW/417/4FF/4NB/5DL/688
2013 BMW 535i GT- Neptune Blue-Venetian Beige Dakota Leather-Fineline Matte Wood Trim-ZCW/ZVP/2ST/3AG/416/677
2010 BMW X5 xDrive 48i / 2005 BMW X5 30i / 2003 BMW 745Li
2001 BMW X5 30i / 1995 BMW 525i