I currently have my 2.5yr old dd in a Britax Marathon and I think she could be in this for a long time. She's only about 27lbs and not near the top of the seat at all. I also have a son who is only 2.5 months but already almost 25 inches and 13lbs. So, he will be out of his Snugride soon. I need advice on what seat to get next. I could move ds to the Marathon and get my dd something new (if there is something out there which can be used longer than the Marathon). Or I could just get ds something new. Price is not important, but safety of the seat is.

Also, we plan to move to Australia next year and are hoping to use the seats there too. Does anyone know if LATCH is in the Aussie cars?