I bought these fans off of Amazon:
Thinking they would have to be quieter than the original 80mm fans that came with my Rackable Systems. Finished positioning the fans:
To my surprise it is actually pretty quiet even without the case on. I did attempt to reposition the fans with the top on, but the front CPU overheated pretty quickly and it shut itself down. So overall, +1 on the quiet factor & +.5 on the "free" nightlight. -1 on the fact I still can't close the case. My hunt continues for a 1U Socket F heatsink with a quiet fan.