This is a very disingenuous contribution to the thread. The cable management in that image you posted is definitely bad, but that could easily be fixed by spending literally 5 minutes of routing the cables through rubber grommets. Here is my Hackintosh build:
I used only ONE tool for the entire build from start to finish. A phillips screwdriver. I too, have drive sleds. My PSU has a hybrid mode of operation, the fan in it doesnt have to turn up until the system is at 20% load. My case is covered with sound isolating foam, to keep it quiet. The computer at idle is nearly completely silent, at full load it generates only a low hum. The perforated openings behind them have a dust filter so it remains dust free and clean on the inside.
But if you wanna see some really nice cable management, check out Jayz2cents PC build:
^^^Crazy how clean that is. Not my style of all of those fans and the case (I think its ugly)... but that is cable management from the gods.
Next, the innards definitely do look much cleaner in a cheesegrater mac pro compared to MOST PC builds. However, this is largely aesthetics and it will never be seen anyway with the side panels closed on the case.
I will however agree that the cheesegrater design of the Mac Pro case is REALLY well done and is in my top desktop top 5 favourite PC cases ever designed... and I can say this as I've owned the original Mac Pro 2006 and the 2008 model. I've built my hackintosh because I got tired of Apples horsehockey with bottlenecks and limitations. The new Mac Pro is a joke for proper upgrades (albeit a nice aesthetic design).
However!!!
It's not like great case designs are exclusive to Apple designs! While I've got the Fractal Design Define R4 case with a window, I've got my eyes set on this case:
And you know what? I can actually do this. I can swap the case at will... reuse my PSU, cooler, etc. This freedom has never been a possibility with Apple.
I gotta admit though, I prefer if the case were in white like the smaller mATX build;
Another sweet case worth mentioning: