A rear-facing car seat causes the passenger seat to have to be moved up really close to the windshield. It's one of the main reasons we haven't gone on any major road trips with the baby yet. And ever since everyone we know got a front-facing carseat for their young baby, we have been researching getting a new one ourselves to reclaim that room.
But in talking to local experts, we learned that it is safest for babies to stay in a rear-facing infant carseat as long as possible, until they are 18-24 months old. So as nice as it would be to be able to have more room, our baby will stay in his rear-facing carseat until he grows out of it -- (And at 18 months, he is just starting to).