Well, I'm no expert, but I do have a FK603 modded to hold 120mm Panaflo L1As front and back. And the case is really pretty quiet -- the 80mm Sunon on my Swiftec contributes most of the [low] noise level.
I would bet you that you can make most cases "quiet", including these three. Provided they're all well put together and don't vibrate, I think the important things to keep in mind are (and most of these are common sense):
- low db fans -- a 45db Delta fan is gonna be loud in a concrete case.
- big fans -- 120mm fans move large quantities of air at lower noise levels
- good fan placement and use -- 10 case fans is gonna be louder than 3 or 4
- remove restrictions, such as the case's metal "grills" by the fan openings -- they restrict air and make noise due to turbulence
- try mounting the fans with spacers/grommets to minimize vibration noise
All that said, I'd pick the case you think looks the coolest.
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