If I were being offered one of these cases for free (money being no object), I'd definitely like to try the Silverstone FT02. For the price though the R3 is probably a safe choice.
After months of minor tweaks and adjustments, I've finally got my R3 to the point where I can say it's *almost* completely indistinguishable from background noise; I'm not sure I can tell if it is on or off from my chair (I'd need to get someone to give me a blind test).
Of course to achieve this I've had to spend a fortune on quality fans and suspend my WD Green drive with stretch magic.