I am waiting for a year end incentive as well, I dont expect much incentives for teh 2013, maybe a $1000 or so.
Usually if you order a car, the discount will be less.
Runflat tires in the city usually last for about 25K to 30K miles.
seat comfort wise, there is no difference between the standard leatherette and leather. Try the extended test drive, sometimes it takes a long time to get the seat adjusted just right.
satellite is not standard.
BMW use Sirius, you need to call them and find out if XM is transferrable to Sirius.
Leather only comes with premium package.
The back up camera have lines telling you the distance and trajectory.
If you want audible sound, you need to add parking sensors or the tech package.