What did you get exactly? ..... I'm allergic to noise as well.
I purchased two of these:I'm very curious about fans too if any one have any suggestions
Noctua A-Series NF-A4x10 FLX 40mm Blades with AAO Frame, SSO2 Bearing Premium Fan-Newegg.com
You will have to get a bit creative with the mounting as the holes are for 30mm fans. I used a single rubber mount that came with the fan on one of them and a twist tie for the other. They seem to blow at least as much air and are MUCH quieter.