Chennai heat + city traffic — which 125cc scooter survives best?

Daily 22km through chennai traffic, mostly stop-go, brutal heat. Need a 125 scooter that stays cool, gives real mileage and doesn't cost a bomb to service. Shortlist: Activa 125, Access 125, Ntorq 125. Access feels most practical but Ntorq is fun. What are owners actually seeing on mileage and reliability in this climate?