We had the Chico Keyfit 30 for a rear facing infant with the detachable base. It was nice having multiple bases for grand parents and stuff. Loved it.
My wife has Recaro seats that are good until something like 65 pounds, girls will be in those until they can transition to out of car seats all together.
I had Britax and they were nicer than the Recaro seats, but didn't have the same weight range. I liked that each side tightened where as the Recaro only tightened on one side.
I have boosters now, which kinda sucks because my kids can't buckle themselves in yet.
Ugh, I was so excited to have a kid in a Recaro baby seat but they recalled them and stopped selling them in the US due to safety concerns.