Well, the first thing to know is that the latest recommendation based on extensive research is that children are significantly safer rear facing, and thus should rear face as long as possible--which can mean to 3 or 4 years of age depending on the size of your child and the car seat you pick. See
Rear-Facing Carseats and Safety for more information. I'm always surprised at how many parents don't know about this and / or choose to ignore it.
This is not popular--many parents seam to view front facing as a "right of passage" for toddlers, but if kids only rear face, they know no other way, and thus don't complain (our daughter is 3 1/2 and the idea of front facing has never come up). Some parents say it seems uncomfortable--but in reality that's untrue--the kids do fine. Their legs look a little cramped, but as I read somewhere, in the unfortunate event of an accident, you'd always rather a leg injury than a head / neck injury!
So, based on that information, I'd recommend you choose a seat that can rear face for a good long time. For that reason, the Sunshine Radian is a top choice for many over at the forums at
Car Seat.Org - Carseat, Vehicle & Child Passenger Safety Forums as it allows rear facing to 40 pounds (with a height restriction which they all have). We have one, and it's heavy, doesn't seam quite as well made as the Britax's, and takes up a TON of room rear facing--which is an issue in most cars, but not in an Ody (which is why we got one!).
Britax also just re-engineered all their convertible seats (watch the video at
Car Seats - Britax USA), and they seam to spend a ton of money on R&D--and the quality of their seats are second perhaps only to Recaro (my personal favorite seat, but it's very tall and expensive). The Advocate 70 CS seamed to us to offer the best side impact protection, but there are no standards or good tests, so we're all on our own to guess which is truly best. The downside of the Britax is that it's VERY wide, and only supports rear-facing to 35 pounds.
We use the Britax behind the driver's seat and the Sunshine in the center seat (the safest location and most immune from a side impact)--both in the second row. The Sunshine is nice because it's very narrow, but still seams comfortable. We also tried the "Extreme Air" which ToysRUs seems to be pushing, it seemed quite cheaply made to us and we returned it.
If you're on more of a budget, the Graco MyRide 65 is great, and also supports rear facing to 40 pounds. It's what we have in Grandma's car.
The blog (
CarseatBlog.Com - Child Safety Seat Reviews, Ratings & Advice from the Official Car-Seat.Org Blog on Keeping Kids Safe in Cars.) and forums at
Car Seat.Org - Carseat, Vehicle & Child Passenger Safety Forums are a fantastic source of information; I recommend you check them out before you buy. The blog includes an incredibly extensive write up of how many, many seats fit in the 2011 Ody--which I linked to in an earlier post above.
Cheers!
Tim