I saw this keyboard when i was looking for a new keyboard from Razer.
But, i saw the Razer Lycosa MIRROR, too, and i got in love with it.

The Lycosa mirror (the glossy edition) its like the arctosa, but sturdier, with a USB port, headset plug, beautifull BLUE backlight for the keys, that only makes the key glow, no glow outside the key; and reading what you said from the multimedia keys, then this one has better multimedia keys, they react even when a gentle push, but they doesnt get pressed by error either (i think these ones are really touch buttons).

One thing that really catches your eye when unpacking it, is that it has a thick cable, and at the end there are 2 USB connectors and speaker / mic connectors. If you want you can only plug the Keyboard one, the other USB is only to make the USB work (at full speed btw), the same for the speakers / mic connectors.

Well, the Lycosa Mirror is my dream keyboard :), and i really recommend it :)