Hello,
We'll improve our products for less noise.
We're going to provide RPC-4224 users 120mm fan bracket for free later (customers are responsible for shipping fee).
Better yet, give an option to purchase without fans, middle and rear, at a lower price. Keep in mind that the majority of your customers are probably small business or home enthusiasts. So noise is really a BIG factor.
I would really love to order the 4224 if there is a guarantee that I will get the 120mm fan plate for free when it is available.