Nexus Fan Adapter:

The Fan Adapter is a great accessory for anyone wanting to put a larger 120mm fan onto a mount that only supports 80mm or 92mm fans. When using a larger fan you can not only increase airflow but also greatly decrease noise at the same time. Personally, this is something I will test on my CPU cooler to replace the current, and loud, 80mm fan I have now.

Nexus 120mm Fan Filter:

The 120mm Fan Filter is a great accessory for any intake fans on your case. I used to have a case with built-in fan filters and it really suprised me just how fast they would completely clog up with dust and dirt. It goes to show there's a LOT of dust going in and out of your computer so an extra accessory like this is well worth it and will help prevent your heatsinks and fans from getting clogged up.