Originally Posted by TeleFragX
Well my radiator will have 3 fans on but the only fans with 90cfm are the ones that at 45dba
My whipping-boy BigWater SE has a single 12cm radiator, and I replaced it's fan with a silent, low-flow Nexus 12cm. It adequately cools my CPU and GPU. If my wimpy kit can cool adequately with a silent fan, I figure your studly custom rig can too.
If you're interested in silence, you might check out the info at thermochill. Their radiators are specifically designed for low flow fans and silent operation. I do not have one, but have my eye on them--their 16cm model seems particularly cool:
(I neither own nor have a business relationship with them.)
But back to the topic at hand--I bet you could get by with quiet fans. I suggest that you at least get a $3 fan speed switch, and see if your fans work at lower speeds. I bet they will.
If not, your money cheerfully refunded.