Car seat/booster recommendations?

[spunkybaby]

I am thinking about buying another car seat/booster for DD1, who is 33 pounds and will be 4 in March. Right now she sits FF in a Marathon in my parents' Sienna and a Recaro Young Sport in my Odyssey. DD2 (13 months and 20+ pounds) sits RF in a Marathon in both cars, and we have a Scenera in DH's car. We may need another car seat/booster in DH's car (a 1996 Honda Civic 2-door) for short trips to the babysitter (1x each week, about a 5-minute local drive) since I am going back to work 1 day each week. I will drop off the kids, and DH will pick them up, so another option is to take out one of my seats when I drop them off.

Any recommendations? I would love to buy a Britax Parkway, but I'm guessing DD1's still too little and too young. And DD1 is not heavy enough for the RideSafer travel vest (darn!) Or should I just switch out the car seats until DD1 turns 4 and gains some weight?

TIA!

ETA: No tethers in DH's car, and the two carseats would have to be in the outboard positions.

[o_mom]

nak - Graco Nautilus? FF only, 65 lb harness, taller than the marathon (slightly) and doesn't require headrest like the Apex.

Can you have tethers added? Not required, but does increase safety.

[spunkybaby]

Thanks, o_mom, I will take a look at the Graco Nautilus although it's a little more than I was hoping to spend, especially for a Graco. I doubt we'll install tethers since we're having discussions about replacing DH's car with a newer one.

If anyone else has any recommendations, I'd love to hear them!

Thanks again!

[o_mom]

Does she still fit in the Scenera? You can't go wrong at $40. The Graco Cargo (w/front adjuster) would also be good. Only harnesses to 40 lbs, but that may be plenty given her light weight. The Nautilus makes a better booster later, but the Cargo is cheaper ($80-100)