If I remember correctly, it was from build 126 to build 127 that B & O had a go on the "clouding issue", the picture got darker in normal settings.
I also still have some clouds during dark scenes even with build 153 and the installation of a special aluminium plate on the back of the screen.
I had a DVB and analog module death between build 126 and 127 but it was due to a faulty puc code that damaged the mother board
(yes it's complicated !).
My puc codes also had to be updated in the same time that the update of the firmware (I lost the control of my set top box and PS3 RE-BL between build 126 and 127).
So, to resume, yes you'd better get build 153 because you may see less "clouds" (it won't be worst anyway) and you get the addition of Beo4 with navigation wheel that, once you get used to it !, is great.
Cheers,
Gregory
Since 1995 : Beosound Century, Beolink 1000, Beocom 2400, Beovision MX 6000, Beocord VX 7000, Beo 4, LC2, Beosound Ouverture, Beolab 2500, Beocom 6000, Beolab 8000, Beosound 9000, Beovision Avant 32, Keyring, Bottle opener, Beosound 2, A8, Beosound 3, Beovision 10-40, Beo 4 Navigation, BeoTime, Beocom 5, Form 2...