[XLR8_24/7]

I am about to place my order for an X5 and have a question about the suspension. I realize this topic has been discussed at length, but I am still having trouble. I am ordering an Msport with the Advaptive M Suspension + rear axle air suspension. Is this the most aggressive suspension offered? I am wanting the firmest suspension that reduces body roll and increases corning ability. Thanks in advance.