If you consider an U9S, maybe you can consider the Thermalright Silver Arrow 130 too, which should beat an U9S easily.
SA13 should fit inside a M1 (but you should investigate further).
I would be open to giving this cooler a shot, but where can I find one? I only did a quick search, but didn't see regular availability for my region (USA). I looks pretty nice, though! I'll do some more research on this one, and thank you for the suggestion!
Yes, I also saw this webpage, and because this I purchased the Dark Rock TF, I have Corsair LPX ram modules, but for me this setup is dangerous, I travel with the computer and I don't like these ram modules pushed.
Ahh, then my suspicion was correct... LPX wouldn't make the difference. Good to know, and I'm sorry you had to deal with the issue I was hesitantly heading towards. I'll just cross the DRTF off my list, then. Thanks for the comments.
Macho 90 (vs U9S) has the upper hand in low-noise cooling. Also half the price.
The Macho 90 has the same issue as the SA13... I don't see where it's available, but I still appreciate the suggestion.