What car seat for a 6 year old?

[Crutchlow35]

We had a graco but are now driving longer and DS says he's not comfy plus the one we have has dreadful reviews on Which so what would you recommend?

I have a Maxi Cosi Rodi for DS. He's always been comfy in it.

The Britax ones are all very good, from the basic Adventure to the more expensive ISOFIX ones.

I have two Adventures, and a KidFix ISOFIX one, both fit my 8 year old 133cm tall son and my 5 year old 109cm tall daughter equally well. They can both sleep in the seats (this doesn't happen often, usually just when we are coming back from holiday and travelling late) without slumping over. The head rests are very deep and supportive.