I have been into specialty Bimmers and M cars for awhile...
My first BMW SAV was a 2000 X5 4.4, then I quickly graduated to the 4.6is
...after I sold the 4.6is, I bought an e34 540i/6 Msport (which I wanted to upgrade to the performance level of current M-cars by way of a Procharger and a promise by a local tuner to get 500+ hp out of it).
The shop performing the work failed to get the Procharger figured out after a year and a half, so my frustration set in and I ditched the project.
After giving up on the Msport, I decided to go back to an M....
an X5M with 555hp!
The first upgrade was an Active Autowerks tune for an increase of 86 Rear Wheel HP and 117 Ft lbs of Peak torque!
This provided an awesome upgrade that you can actually feel!
Then I added BMW Performance black kidney grills and matching gloss black sidemarkers.
Then after looking at various 22" wheels, I decided on BBS SVs:
and a set of H&R Springs