As you child is tall, I would look for one where it grows in height and also the harness as well. Even though they are rated to 26kilos some actualy are rated hire in America and other countries. So if you can find out if they are get one of those. I know that safe n sound (britax is the main company make seats for america which are the same as ours just with different logos on them.) I have the pegasus (i think) as it is quiet wide at takes up alot of space. I also have a maxirider and my 5 yr old sits in it at 115cm and has some more room to grow, hers is the older style one so can't have a harness but the new ones can. I love it.