Mclaren. Folds with one hand and a foot (originally to board a bus while holding the baby), went lengthways in the boot of our car. Aluminum for light weight, blanket, shade and rain cover. More recent designs have seen the weight of buggies creep up, get over to retrobuggie and see how it's really done.
My sisters have Phil and Ted for more heavyweight duties and off road, but always go back to the Mclaren for simple town use. We've had 10 kids between us, every one has been in a Mclaren at some stage.
As I tell new parents - cheap pushchair, expensive buggy, because six months down the line, that pushchair will be in the garage and you'll be out with the buggy.