Quiet Fans with rpm wire

Iam looking for a replacement ice fan for my shuttle SN45, it would be nice to have a rpm reading and from what i gather you cant do that with the panalfo (sp?) La1. Iam not able to find a us vendor for the S3 noiseblocker. To me it seems like temps would rise if i put a fan adaptar on the outside of the shuttle so i could fit it with a 120mm fan.

Actually, fan adapters tend work best when set to "suck" through them rather than push into them - but lets face it, it might look a bit ugly.