Imo, Zalman make quiet coolers that are excellent quality for the money.
Suitable for a 3500+ would be:
http://www.pccasegear.com/prod1785.htmhttp://www.pccasegear.com/prod911.htmIf you leave your CPU at stock speed, youll get away with running the fan in silent mode, at ~1400RPM.
As for chipset, im not sure what model your motherboard is so its hard to tell,
but this:
http://www.pccasegear.com/prod2833.htmIs about as quiet as your going to get for a little fan.
Unless you go passive that is.