I'd go for a "ball-bearing" fan rather than a "sleeve-bearing" fan if it were me - the $12 Newegg fan has a sleeve-bearing. A ball-bearing fan will be more expensive, but I think they are worth the extra dough.
A sleeve-bearing fan will work OK, but will not last as long as a ball-bearing fan due to its lubrication oil/fluid drying out much quicker than that in a ball-bearing fan. Over time, a ball-bearing fan will also be quieter, as a sleeve-bearing fan will get noisy as it ages (much quicker than a ball-bearing fan).