Door #1 or Door #2?

[Kief]

Currently, we (my wife's car) have a 2011 X5d and it's pretty stripped: Sport pack w/20", leather, heated fronts, rear climate pack, running rails, and spare tire. It only has 30k miles, but the interior and lack of technology is getting old (was offered $33k for a trade in). I went yesterday to drive a 35i Luxury line and it was okay (the MSport is a must for me w/20"). It drove very nice and overall felt similar (aside from the steering, sound) to my E70. I'm torn with ordering 2 polar opposite F15s:

#1: X550i w/the following--
MSport w/20"
Mocha Dakota
Fineline Pure Wood
Dynamic Handling Pack
Lighting Pack
Spare Tire
Surround View
$80975

or

#2: X535i w/the following--
MSport w/20"
Paint
Mocha Nappa (Mocha Design Pack w/Multi-contour seats)
Fineline Pure Wood
Driver Assistance Pack
Driver Assistance Plus Pack
Dynamic Handling Pack
Lighting Pack
Premium Pack
Harman-Kardon
Spare Tire
$78450

I've never driven an X5 with Adaptive Drive/Dynamic Handling Pack, so I'm not sure if I'm gambling on whether it is worth the premium. Of course everyone that has it loves it. My priority (although it would be my wife's car) in comparison to the E70 is quicker and flatter handling. Comfort is nice, but not my number #1, sport is my #1.

So here are my concerns. The V8 is notorious for carbon build up and engine issues over time. My local dealer just repaired 4 V8s last month alone. My SA and master tech recommended the 35i or diesel (I want to return to gas due to our driving styles). It appears the V8s suck in terms of resale and this would not be a lease. On either spec'd vehicle, I doubt I would see a resale value on the Dynamic Handling Pack, so this also makes me question whether it is worth the $4600. Although I am not too concerned with mpgs, I obviously know the V8 is going to be significantly worse than our current diesel. The perks of the V8....the power and exhaust sound!

The perks of the 35i....quicker and lighter than my X5d, similar mpgs, basically fully equipped (so maybe better resale?), $2500 cheaper, and perhaps better reliability.

So guys/gals, which door should I take: #1 or #2???