We have a smallish SUV and a mid-sized car. LO is currently rear facing in a Britax Marathon. She'll be 2 in May and is creeping up on the 35lb weight limit for rear facing in the seat. I'd like to keep her rear facing for a while longer, but we're expecting another LO in September and can't see how we can fit 2 of our current car seat model in the back of our cars. So I'm trying to find convertible car seats that might not stick out as far when rear facing. I don't mind pushing the passenger seat up to give it room, but the driver seats need to stay where they are and DH needs the leg room.

Any suggestions for convertible seats that take up less space? A bigger base is fine, it just needs to not push into the front seats. Is that even possible?