⊱.S.
Hello,
We went from the Roundabout straight into the Britax Frontier 85 carseat/booster. You can use the 5 pt. harness up to 85 lbs.; beyond that you convert it to a booster. We have one for each car and it's really roomy and comfortable. Our 6 yo loves it.
Added: Why the snark, Rachel? I don't understand why you're knocking the moms who want their kids to be the safest they can possibly be in the car. That's uncalled for.