We are in the market for a new car seat and I am thinking of the Britax frontier. It's what he has in his dads car and frankly, the 85 lb harness limit seems good for my 95 percentile kid.
Anyway, I was looking at photos on Amazon (of this and the Graco nautilus) and it made me wonder - does height not matter any more when you get to a booster? There were several pictures and the kids ears were above the back of the seat (which is supposedly when a kid outgrows a car seat).
I think the frontier is still my best best for longevity, but I guess I'm not sure of the "rules" for the next kind of car seat.