I'm in the same situation although my 07 E70 is due to arrive in 10 days. I can always pass on the 07 and order the 08 since there are people lined up to get a fully loaded E70.The only problem is my existing lease is up in October and I'm already over the miles. I need my E70 now and cannot wait for another 2 months. The residual on the 08 should be better but it is offset with the higher cap cost, meaning I will probably not get the almost $3000 discount on my 07 than the 08. If I have the choice, I would probably wait for the 08 but my situation does not allow me to. Good luck.

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2007 E70 3.0