nice to have about three speeds, the reversible is nice for the winter times to pull around the heated heavy air.
I personally think that there is a direct correlation between amount of $$ and quality when buying a fan. Fans now days can be dirt cheap and save a bundle but make all sorts of noise.
I would get a fan in the $100 plus range and personally I like those new fan blades that are coated with rubber groments and snap on. Rather you insert the axle and then pull to one side and the fan blade is inserted. The fan blade fasteners and arm fasteners are the ones that usually cause the humm or the noise when in revolution.
I also like the remote, its nice to have around and great when in bed. You can turn up or down the fan and TV off all without getting out of bed, love it.