I'd also be interested, as I have a BV 4-50 mk3 at home and would like to update to a 65 at some stage.

Here, a side by side comparison, courtesy of BeoPhile

Thank you for sharing this info. The only difference I've noticed is that MKIII has less power consumption than MKII. Wondering whether this is really the only difference of whether I've missed something.

Neither of those screens are the type with the bump on top.  The 8951 and 8952 are early screens from 2002-2004. Those are all 720p maximum resolution screens. You want to get a D10 screen if possible type number 9089 They are 1080p with excellent brightness and contrast. The last screen with out the bump on top was a D9 type 9049.  A few D9 panels ended up in the new frame with the bump and curved frames only made from feb-mar of 2008 type 9059.  The D9 was also a 1080p screen but generally has a darker picture with either a system 1 or 3.  The last 50" US screen was the D11.  2009-2011 type 9140.

The D9 consumes 517 watts when on,  the D10 466 watts and the D11 was only 237 watts?  I have a D10.  

Thanks expoman. How can I tell which D# version and type the TV is? Are there some uniquely identifying features on the TV itself? Serial number, perhaps?

All Beovision 4's have a grey B&O label on the back that gives the serial number and the type number.  It will also give a production date.  From this information you should be able to determine the D#.  Sometimes you need to reference the serial number.  Example all D-X panels start after serial number 1XXXXXXXX.  If you connect any panel to a Beosystem 3 the service menu of the BS3 will show you all the panel info on screen.  Ex Monitor 1 = D10 serial Number 1xxxxxxxx, type number XXXX.   The production date with my previous info should get you close.  

There is also the exterior design.  

1.  Earliest panels where bronze colored and just had a Bang & Olufsen logo painted on where the panasonic name would have been. D4, D5 or D6? 

2.  Next panels included a brushed aluminum square edged frame in Black, silver or dark grey. Later red and blue added. D7, D8, few D9.

3.  Then bump for remote control eye was added to top right corner and the frame has a curved shape.  D9, D10, D11

do you have the specific user and all documentation for a d-10 type 9089 serial 20856611? i have problems for put in on with a early beosystem 1 im a silver member but just can i get user manuals from past models 

also where can i get the data cable serial to usb B i can not find it  just adapters but are not  know if this is the problem any help is appreciated 

thank you