Celtling has a Radian 80 and I absolutely love it. It has a steel frame, so you get greater strength with less bulk - easier to fit another person or seat in the back.
You can get multiple covers (trust me, you want at least two) which makes traveling much nicer during the barfy stages.
The seat folds up when baby isn’t in the car, making room to haul whatever you need to cram back there. And believe me, there’s a lot of stuff headed your way! LOL!
It’s very easy to install, in both latch and regular configuration.
It is quite heavy, but it has convenient back-pack straps for carrying through airports or between cars. (Alas, not with baby in there.)
The newer version goes up to 120 pounds, so no matter how crazy the regulations get, you’ll never have to buy another seat or booster.
The company has been taken over by Diono sicne I bought ours, but the quality appears still to be there. http://us.diono.com/en/car-seats
ETA: When I left the hospital with Celtling Security came out to check that we had a car seat for her. The hospital made it clear that we would not be leaving without one.