I would recommend an Antec 300D, It isn't the most beautiful case but it has;
• 1 rear 120 x 25 mm TriCool™ Fan with 3-speed switch control.
• 1 top special 140 x 25 mm TriCool™ Fan with 3-speed switch control
• 2 front (optional) 120 mm fans to cool the hard drives
• 1 side (Optional) 120 x 25 mm Fan to cool graphic cards
Even with all these fans I would recommend it as it is rather quiet (I know as I own one myself).
Generally, look for cases with fewer but larger fans. Larger fans will move more air than a smaller fan while spinning at a slower RPM meaning less noise will be made. I have HAF 932 and its pretty much silent, the only fan I can hear faintly is my GPU's fan. The case itself is pretty much silent. If you want even quieter just purchase a fan controller and turn the speeds down a bit.