I'm looking for a convertible car seat for my 11-month old baby, who's about to outgrow his Graco Snugride. I'd like to get a seat that I can keep rear facing for as long as possible, but I have a Honda Fit and am having trouble figuring out which car seats will work. I only have one kid so I'm not worried about how wide the car seats are, just the depth and visibility out the rear window. I'm thinking about the Britax Marathon, the Diono Radian, or the Clek Foonf. I tried out the Marathon in my car in the middle position, and it just barely fit. If anyone taller than me wanted to drive the car, it wouldn't work. Not ideal. I haven't found anywhere local that I can try out the Radian or the Clek. Anyone have any advice or experience with this? Thanks.