Under normal circumstances, I would agree that there is no reason to buy an Active Hybrid 5 besides one-upping reasons.
However, I was given the opportunity to buy one for a slightly better deal (but not cheaper) than that of a 535i. When I added all the options that I want on the vehicle, I will only be paying $800 more for an Active Hybrid 5 as opposed to a 535i. The Eco Credit of $4,500 really helps!
There is a big chance that I will only be keeping my car for a year and a half. When it comes time to sell my car, I would imagine that an Active Hybrid 5 with an MSRP of $8,500 higher would fetch more than the $800 to the 535i.