We have the Joie i-Spin and like it. Seems comfy and easy to install with isofix. Quite pricey but came out well on safety testing
We have the BeSafe Twist/Turn and really like it. Much more than the Joie iSpin in my parents car.
Best ones are Besafe Izi twist or Besafe beyond. Also Britax Swingfix or Cybex Sirona Gi but the Besafe ones will be more comfy and better tested