I should add I'm in Taiwan, and I can't suggest a website to you but we have most of the same products.
The Silverstone AP-121 is listed at $12.5usd here.
Scythe and Noctua ...I haven't seen those brands here, but honestly we have most of the other brands.
I really want a quiet side fan that is set at 1200+-100 rpm, so I don't have to worry about it not running. I've
noticed sometimes (using ASRock Extreme Utility) my fans don't speed up to cool down my CPU and GPU when
I'm gaming. I periodically check fans with CPUID. So, I want a fan that is always on so I don't have to worry about
Do you use a air filter screen in front of all your intake fans? I installed two cuz I noticed a decent amount of dust collecting in the case. I also put two air filters (cheap $0.50) on the top to catch particles that fall in through the top. Am I going over the top on this one?
No i do not think your going over the top.I have the 810 switch it does not get a chance to get to much dust.I clean it with a can of compressed air once every 3 months.I would recommend placing mesh on your fans that blow into the case. This would prevent dust getting into your PC. If you don't
bother with using the mesh there can be a few problems that can arise
Dust acts as a insulation and over time it will build up on your
motherboard and your components. If left unattended it can increase the
heat of your components as it gathers. I've seen people's PCs covered in dust and when they've cleaned them they saw a decrease in temperature.
It's a absolutely a bugger to clean once it's in there. The longer you
leave it the harder the job will be.So your thinking smart imo.