What would be my best choice

[SoccerMom]

I've been reading on this site for a while and have learned so much. Hoping for some help with getting a new seat.

I've got two boys:
DS#1: 3yrs 8m, 32lbs, 38", 14" torso - currently FF in Graco Cargo
DS#2: 9m, 19lbs, 29", not sure of torso, long legs - currently RF in ComfortSport

DS#1 is right at the top of the harness and will need a new seat soon. I figured our best bet would be a Nautilus or Frontier, BUT after trying the Nautilus two separate times, he says that it hurts him and he doesn't like it. He did like the Frontier, but I'm not sure about it since I've read here that it has install issues.
While at BRU, just for kicks I put DS#2 in a blvd, so of course DS#1 wanted to try it too, and he said he really liked it and thought we should get two, so they could have the same seat. (DS#2 doesn't currently need a new seat).
So I just don't know what to do.
Nautilus and ignore that he doesn't like it, Frontier and deal with a difficult install, or a convertible (blvd, marathon, true fit, other?) and worry about the booster down the road? Or is there another seat I should be considering???

[MomToEliEm]

The cargo and the marathon has around the same harness height for that top slot (around 17"). Are you sure your older son is right at the top slot on the seat? Maybe your cover has shifted some.

If you need a new seat, it might be a good idea to try out the frontier to see how well it works in your car. What kind of car do you have? Maybe someone else has experience with it. The radian might also be a good seat to try out.

[SoccerMom]

hmm...I'm getting 14.5" - 15ish". :confused: Maybe because it's older, 2006?

Car is a 2006 Saab 92X, which is identical to a Subaru Impreza Wagon.