Ford S-Max Edge

I really want to buy an S-Max but I don’t know which model to purchase. The options I have are the Ford S-Max Edge, S-Max Zetec and the S-Max Titanium. The top of the range model (Titanium) includes front and rear parking sensors, privacy glass, chrome strips, Sony CD DAB audio system and several additional features. The basic model has some excellent features too such as Bluetooth, quick clear heated front windscreen and other features. The main reason I want this car though is that it is a 7 seater.