I work at a photostudio, I have to put up with macs on a daily basis, here's why they suck: First and Foremost they are rather expensive when you get the absolute best, IMO more than they should be, but then Dell and company cost more too. Because of the higher price they get held onto for as long as they can run, which is a long time let me tell ya, there is an iMac floating around our studio for email... it's a G3. So we know they are around for a while, which doesn't help when they aren't really any faster than your average
PC at release. But the real kicker: no real upgrades, we allready have as much
ram as the stupic macs can handle, and they are still slow enough to get trounced by my S754 Sempron 3400+ In the land of still photography Macs could be replaced easily and for the better, their marketing has convinced my boss that Macs are the best for photography. No offense to my boss, he's a great guy and a pleasure to work with, but navigating a file system on a mac is tricky for him and the other photographers.
Oh yeah and the final offense: I see no bios when I start up, perhaps I'm missing it, but it doesn't look possible to
OC a mac at all. LAAAAAAAME!
**Edit** forgot, I don't really know about mac benchies, but someone is bound to have made one, look for mac superpi or I think the linux super pi would run on osx. browse the google.