I am waiting for sure to order a 650 coupe. The new Idrive - version 4.2 is going to be fantastic. Much more than just 3D graphics. Take a look at the hardware upgrades:
Intel processor 1.3Ghz vs Renesas 600Mhz
1GB RAM (vs 512Mb)
8GB flash (vs 512Mb)
Nvidia graphics (vs Fujitsu)
200GB hard drive (vs 80Gb)
Plus better bluetooth, dual source connectivity for real time weather/traffic, ect.
I am buying not leasing so big deal for me - I say wait, why take a outdated system in a 90K car !!