Hi everyone,

I have an order already in place but not yet in production so I can still tweak it, but time is running out. I've spent hours poring over what information I can find, but I'm still stuck on:

1) Should I get adaptive drive? It is around $2600 to upgrade to it, since I already have the M Sport package. I am leaning "yes" here, but would *love* to hear some arguments for/against.
2) 19" or 20" wheels? I prefer the looks of the 20" wheels, but I'm concerned about ride quality (I live in an urban environment, though the roads are decent). Also, will it affect the quality of whatever winter tires I put on?

Here's what I have so far:

2012 X5 50i
Carbon Black Metallic/Black Nevada Leather/Dark Burl Walnut wood trim
M Sport Package
Cold Weather Package
Premium Package
Premium Sound Package
3rd Row Seat
Multi-Contour Seats

Huge thanks in advance for any advice!