For the money it would cost to get Chalobah, it would probably be worth sticking with Hayden and hoping he fulfils his potential. Spend the £25m elsewhere.
Would prefer Baker from Chelsea but he'd probably cost a bomb too.
Think someone mentioned this earlier. Not a bad idea imo:
http://www.thenorthernecho.co.uk/sport/football/newcastle/15377967.Newcastle__Could_Krul_be_used_to_land_Montpellier_forward_/