I saw some cheap Chinese tyres the other day at a wreckers, plenty of tread but bulges all along the side walls.
I once had a FWD car with worn tyres on the back. When I moved them to the front the car became almost undrivable. I suggest swapping the Kumhos back to the front where all your steering and most of your power and braking is done.
As long as the tyres are the same specified width and profile I wouldn't expect trouble with the AWD. I have never had an issue with my CX7 as the tyres have worn out.
CX7 - The younger, taller and sexier replacement for the MPS6 and the first car designed around the MZR DISI
2007 CX7 2.3 DISI AWD Ice Blue | HID's | ETS TMIC | Cobb XLE BOV | CX9 20" wheels | 245/50/20 Scorpion STR's | CS HPFP | CX9 Brakes | Pedders Sports Ryders -40mm | CS Turbo | JBR 3.5" WPI | Cooling Mist WMI |Versatune