There have been a lot of design-studies in the past and i find the newest prototype actually very good designwise. I don't understand how someone likes the Hassy-look, definitely not the material surface/texture i would want from a professional tool, and yes, I have worked with the H2D in my job. It's definitely a matter of taste and Pentax did it right for me ;-)
The 645D cam posted by zplus is not the latest design.
To clear things up a little bit:
- 2005 Pentax presented three designs to get some feedback from prospective
costumers.
2005 Prototypes
- 2007 the chosen design showed the possibility to open the back and change the sensor
2007 Prototype
- 2009 the cam has some design tweaks
2009 Prototype
There is no removable back, but it is said, that the sensor and even the AA-filter can be changed by service.