I could see them moving for Martial and him doing well there. Bit of an old-school Newcastle-type player and a good profile for them, with him still being a French international. They'd probably be able to pay up for him in January as well.
Depends who the manager is. They’ll have the same problem as us though in that FFP will hamper them more than it has City etc. They’ll not be buying people like Mbappe but the lesser tier players in the PL like Zaha, Maddison, Dunk etc are probably viable.