I've owned 3 4.4 SP X5 so far ( 2001, 2003, 2005 ). I leased each time for two years and I am due for 02-08 ... I hope by then that some irritants will have been taken care of, namely :

1- Nowhere to be foud is the possiblity to install an OEM icth for 07.
How come there is no towing package available after all those years?
Have you lookked at the 07 rear bumper - No " door " for the itch !
New bumper needed ? Come on ! This must be a joke.
Is this a truck or what ... S'cuze me ... It's an SAV !
2- In Canada this SAV comes on run flat tires exclusively ... WOW !
Almost no availabity. Those tires are "city tires". If you ever have the
bad luck to puncture one of those babies in the boundocks you'd
better pray to I don't know who to have it change or be close to a big
city to have it fix , otherwise here comes the flat bed and a lost day
waiting for a fix ... And I am not talking $$$ ... I know, those are for
my security!
Option : Install conventional tires for 1.5K and eat those
run flat and get a latex can cuz there's no room for a spare !
3- I won't talk about the outrageous 07 price of that SAV in Canada.
The difference in price between the US and CDN is hard to swallow.
4- If you order the SP you'll have to do W/O the overdue double wishbone
suspension ... among other things. Well done BMW.

Hope all those will be adressed before the 08 model year otherwise my garage might be host to a MB ML63 AMG with the towing package installed
but no hand brake ( It's a US like pedal ) !!! You can't win them all ...