Quality, materials, appearance, features. That's about it...

. Take a look at the Antec SLK3700AMB/ Compucase 6A19 (twins under the skin) and you will see my idea of a great basic design. Note the hard drive noise damper bushings. Note the 12cm front and rear fan mounts. Drop by
http://www.coolcases.com for more info. The Evercase 42x2 series is another good example - high on SilentPCReview.com's list of "quiet to begin with" cases. Note Maximum PC's recent review of the Marauder PC (August issue) - that's a GC 4292 (Evercase says the GC stands for Gamer's Case, but I say it's for Garish Colors

) on the cover. But the Marauder company apparently doesn't know their stuff. They didn't use the (optional, but only a $1.75 from Evercase) HD vibe dampers (but it was quiet anyway!). Nor did they tweak the system for stability prior to shipping it out (probably would have just needed a RAM voltage adjustment)... Stay away from Marauder!
. For an example of a near-perfect, high-end feature set, see the Kingwin 424 series. And it's made of aluminum so it will be easy to graunch the fan mounts out to 12cm...
.bh.
Where's the :sun: ?