Chicco car seats are always among the top rated car seats on the market. They have superb safety ratings & are some of the easiest to install. They rarely go on sale but right now you can get one for 20% off plus free shipping (details below).
The Chicco Keyfit is rated #1 infant car seat in America and is one of the easiest to install correctly. It comes with a removable newborn infant so it works for babies from four pounds to 30 pounds.
The Chicco NextFit can be used with children from five pounds to 65 pounds. It is one of the easiest to install convertible car seats and has a 9-position Leveling System that accommodates a wide range of vehicles.