Following this thread closely! We just purchased a Nautilus because DD1 (5 years, 2 months) grew out of her Safeguard Go. After weeks of research and indecision, I decided on the GN. She rode in it for the first time today and it went well. She seemed comfy and liked the cup holder and other design aspects. The other seat that was close in the running was the Frontier, but the GN won out due to higher harness height, plus it felt sturdier to me when I compared them in BRU.
We have another GN on order as she is also growing out of her Wizard, but it's not due to arrive until March (!!) from the online Target store, so of course I'm rethinking my decision. I'm a bit anxious about her comfort in the GN as she gets older/bigger as far as growing room for shoulders and hips. She's a narrow, lean kid with a long torso, so it will probably be fine. But I wonder if I would be smarter to get a Regent for our 2nd seat for her, to keep her in a 5 point for longer in our primary vehicle? Or if she'll get cranky (later on) if she's in a 5 point in one car but in a booster in another.....
We have another daughter whose Wizard will expire in July of 2010, so we can always give her the GN to use at that time and then re-evaluate where we are with DD1 as far as another carseat. The page of pictures of all the big kids in the Huskies/Regents was very reaffirming, as I had found myself thinking that DD1 would be in a booster by 6 or 7 depending on her growth patterns. Maybe not.
Gee these are hard decisions to make! Nice that Britax is going on sale soon, though, I do indeed decide to get a Regent.........