U could get the ASUS P8Z68-V , it has also the USB3 bracket and it is only $10 more : )
ASUS P8Z68-V/GEN3 $189.99 + FREE SHIPPING
ASUS P8Z68-V PRO/GEN3 $199.99 + Free Shipping
That's actually a great deal. On my mobo/case, you have to snake a long (not long enough to clear a video card) cord coming from the inside front of the case through the back, then plugged in to the USB 3 in the back. Effective but messy. This adapter would allow a direct connection to the header on the mobo. In my case I would just remove the bracket and use it as an adapter.