i have a 6008/P20 bundle...the 6008 will not accept either phase or leaf because of the physical size of the housing which would have to be changed to enable rotating...the sinar backs and emotion backs work on the 6008, they also rotate..the imacon backs work as well...
i read in one of the releases, that rollei will sell the Hy6/emotion75 bundle right now with a 6008, which will be exchanged for a Hy6 as soon as it ships...now sure if the dealers even know about that or if that will be offered in your area...i would check...the rollei/emotion deals are sweet, just like the P20deal, you get the camera (plus lens) for free...
i owuld not be surprised if leaf would throw in a free leaf Hy6 when you buy an Aptus75...they did it with the prodigital kit with mamiya 645...it ensures you stay with leaf and their mount and just keep upgrading within their system....in other places in this forum this was referred to as a closed system like hasselblad, which is simlpy crazy...you can still buy a rollei Hy6 and use it with adapters and you can still use any lens ever built for the rollei....the back manufacturers have no interest in making one common back connector and as long as they are all different, the cameras have to use adapters...obviously...