I will address one more thing to think about. I'm not the kind of guy that buys something to use and then throw away.
The fans that are cookie cutter type, all look the same, use standard parts. You will be able to disassemble the fan and take the bearings to any parts house and get a replacement. In the long run it is cheaper because you can break them down, wash, clean and replace parts. The all metal housings are a plus for me to.
I think any decent fan can be run and run quiet. The way you mount and design the room is a big factor.
@Rrog if you built a room to house the fan and you use a little insulated duct it will be fine. You could also add egg shell foam to the walls to help with noise.
Those foam toppers for a mattress at Walmart work great. Get the ones that are an inch thick. They have a flat side and the other has a design on it similar to sound absorbing foam. I paid like $10 bucks a piece for the ones that fit a full size bed.