R.
We don't have LATCH either but the Graco SnugRide fitted perfectly. It was part of a travel system and we loved it. I think they have replaced it with the Safeseat but I imagine it will fit just the same. If I needed another one, I'd get the snugride or safeseat. If you read BabyBargains, they tell you some websites where you can check to see which seat fits in which cars. I remember, we opted for the Graco for several reasons, one being that it was the most universal and would fit almost every car.
Now my little one is bigger (11 months), we use the Britax Roundabout which, again is excellent. I would be happy to use it with a newborn if we didn't have a travel system.
Good Luck,
R.