What a wish list.
The thing is, you say you need a 4x4 so why are the Merc,Lexus,335,S5,A8,7 Series & the SRT-8 listed?
A car that you've overlooked which is right under your nose is an X3. If you like the X5 then the X3 is perfect. Cheaper to run,same build quality,great engines & a 4x4. Seems a shame not to concider it.