Long term rentals in or around Nice

Hi there,
My husband and I are looking to move to Nice next year. Although it's a bit early to start looking for places to rent, we wanted to get an idea of costs and what we would get for our money. It's a bit of a nightmare! We can only seem to find holiday rentals and we're looking for at least a 6-month initial lease. We're not too fussy, as long as we are within an hour of Nice airport and the place lets us bring our dog! Does anyone know of any good letting websites for longer term rentals? Thanks!