i just purchased the Haf X case and it has 3.0 usb at the front.. the work-around (since motherboard are lacking usb 3 headers) is coolermaster routes usb 3.0 cable from the front of the case out thru the back and into the 3.0 usb plugs on the motherboard.
personally, for future-proof i would buy a 3.0 capable motherboard along with sata III ports. granted your case has no usb3 ports, but you can always plug any usb3 device in the future from the back..