Britax Convertible Baby Car Seat, Marathon Granite —
I am thoroughly pleased with my Marathon car seat. My only warning is this. My daughter is currently 17 + pounds and about 24" long, and is still rear facing. When baby is rear facing, there should only be 2 fingers able to fit between baby's chest and the straps. I am always uncomfortable with how tight the straps are - they never seem tight enough, even when pulled as tight as they will go. I caution because I would not feel comfortable using this with a newborn, although the seat says it can be used for babies as small as 5 pounds.
Though I gave this 5 stars for durability, I've only owned it for about 6 months so I can't really speak to durability beyond this period.