Hello Dometic (if they are still monitoring this thread).
I've have a CFX3 35 for about a year now - and no issues with it.
I just purchased a CFX3 25 (brand new) and I must say the compressor seems really loud.
Comparing the CFX3 35 and 25 compressors, when running:
The 35 has quiet(er)...
There is a thread about this on the Clublexus / GX460 forum. There is a reference to the Dion Dynamics site in the thread.
Lexus GX 460 Bulb Guide thread