The 1200 SKU (the completely matte, non slim one, are the most silent.
My CUH 1200 sounded slightly hearable before. Bit more silent now, but I could be imagining things. It never was loud to begin with.
99% of the time it's overapplied or underapplied. If you have taken consoles apart and do it yourself with a quality brand, it's night and day with the fan sound.