I actually considered the M Kit for a long time. But after looking at it further, I actually like the look of the Aero Kit better. I like the stock, sport front bumper with the mesh grills. Also, dealers can't order the M Kit as a "Kit", here in the US. Currently, you would have to order it piece by piece, including ALL the mounting hardware. It made no sense. It's only offered as a "kit" outside the US. I even tried Canada and that was a chore when talking to some dealers up north. I'm sure it will eventually become a kit, here in the US, once the M X5 is out, but for now, it's not offered as a whole.
H&R makes springs for our car, so no need to go the Hamann route. I should also point out that H&R makes the springs for Hamann. Hamann's springs are actually, H&R. Most people don't know that, but I was in touch with H&R a few years ago regarding my E60 and development of a new suspension system. I was talking to their R&D team on a weekly basis, for months. At the time, Hamann was the only company that offered it at the time and they proceeded to tell me that this system was actually made by them (H&R). They finally offered the same kit under the H&R brand and I saved a ton of money, as opposed to going with their system under the Hamann brand.
As for Spacers, I just need to determine what's the appropriate width for this vehicle. I've had spacers on all my BMW's, so I'm very familiar with them. I just need to figure out the ideal set-up for this particular car, based on the correct offsets of the 214's and the remaining gap between the wheel arch and the outside of the tire/wheel. I'm going to use a tape measure and see. I know 10mm will be perfect for the front, but am unsure of the rear. Once you open and mount spacers, you can't return them, so I need to make sure I get the correct size for the rear. It's either 12mm or 15mm. Fortunately, I don't have to be worried about rubbing, since the car sits so high. However, I don't want the wheels sticking out beyond the wheel wells or my X5 will look like it came out of a Cheech and Chong movie.
