Car choice may depend on what buggy you choose. I have a bugaboo chameleon, which I love for charging about pavements, trains and the parks...but it is quite bulky for the boot of the car.
We got a Volvo V70 while I was pregnant which fits the bugaboo is super-easily so you don't have to faff about with it while getting your little one into the car. My brother has a golf, which is great for parking, but a nightmare when they go away with 2x kids, car seats, buggy, cots etc...
My wise old dad's advice was "get a big car with lots of boot space. Once you've decided to get a big car, get a really spacious one. You won't ever notice that your car is too big, but you will notice every single time it is too small"