Modern Wedding cars in the North West?

I need a little help. I am getting married next year and we are looking for a good place to hire a limosine from. It can either be a town car, a Chrysler 300c or a Cadi. However many of the places that we've called have either been call centres or the prices of the car has been astronomical (well over �500!). Can anyone help? We live in Chester. Does anyone know of anywhere we can get cars from?