need help replacing 2 seats for my 3.5 year old

[sandrc]

I need to replace 2 seats for my 3.5 year old 40 pounder seated height is 14". First one and the one with most priority is a Cosco Scenera. Obviously she's outgrown it. It is the spare seat that gets used a few times a week in a 2005 Chevy 4 door pickup. I keep her in the middle seat position and have been using LATCH to secure the seat. There are 2 other children that ride in the back on either side of the seat, one in a backless booster, the other in no seat at all (12 years old)
I need help finding a replacement 5 point seat.
The second seat that will need to be replaced at a later date will be the main seat. A Britax Marathon. My DD is on the last harness slot in this seat. I'm expecting it to get her through her next birthday, hopefully longer! This seat is in a 2004 Chevy Impala. Secured using LATCH in the middle back seat position. Rarely will there be any other passengers in the back.

I want something that is easy to use and install, has high weight and height limits, DD is very tall for her age, as tall or taller than the average 4 -5 year old. I'm willing to spend what I need to to get DD a great seat that will last a long time.

I have tried her in the Graco Nautilus in the store. Didn't have much time to play around with it but one thing that worried me was the crotch harness release. DD was able to push the button down and unbuckle herself. I'm afraid she'll do that when in the car, is there something to put over the button to deter her from releasing the harness?
I've also seen the Frontier in the store. Looks like a great seat. However, I have heard that there are problems with the harness coming off of the plate in the back.

Help and opinions please!

	Britax - Click for more info Britax International has been producing reliable child safety products for over 30 years. Not only does Britax have decades of experience creating car seats and other children's safety equipment, Britax has a long standing reputation as an industry leader and innovator. Britax International is headquartered in the United Kingdom, but Britax car seats are designed and manufactured at facilities in Germany, Austria, and the United States. In the summer of 2002, Britax strengthened their commitment to creating the safest car seats with the opening of a brand new, state-of-the-art crash testing facility in North Carolina. Britax car seats have a reputation around the world for being some of the safest, most reliable, and best designed child safety seats ever made.

	Booster Seat A booster seat raises your child up so that the car's lap and shoulder belts fit correctly. The lap belt should fall across the upper thighs. The shoulder belt should go across the middle of the shoulder and chest. A booster seat is used for older children up to about 80 pounds. Some states have passed laws requiring booster seats for children up to age 8 or 80 pounds. Check your state's law.

	Britax Marathon - Click for more info Increasing the time a child can safely stay in their convertible car seat is a big issue and Britax engineers have come through in a big way with the introduction of the Britax Marathon with LATCH. A LATCH Compatible Convertible Child Seat, the Britax Marathon can be used rear facing 5 to 33 pounds and forward facing from 20 to 65 pounds. Compare the numbers and you will see it is hard to find a seat with these weight limits that is safe and functional.

	Graco - Click for more info Graco is one of the world's best known and most trusted juvenile products companies. They started the entire juvenile products industry with an invention called the Graco Swyngomatic. Since then they have invented products that have changed the way that parents travel with their children such as the travel system, which has made it so parents can lock an infant car seat into a stroller easily, without waking their sleeping baby. Their Graco SnugRide Infant Car Seat is pretty much synonymous with the term “infant car seat” because of its safety and design features coupled with its affordability. Today Graco continues designing and developing top-quality products that inspire parents and keeps children safe. Check out the new Infant Safe Seat Step 1 and Toddler Safe Seat Step 2 for proof of Graco’s continued commitment to child safety.

	LATCH LATCH stands for Lower Anchors and Tethers for CHildren. It is a system mandated by the Federal government in an effort to standardize and simplify the installation of child restraints without using the vehicle's seat belt system. New vehicles and child safety seats manufactured on and after September 1, 2002 will be equipped with the LATCH system. Cars, minivans, and light trucks will be required to have anchor points between the vehicle's seat cushion and the seat back in at least two rear seating positions, and a top tether anchor (with the exception of convertibles). Child safety seats will have a lower set of attachments that fasten to the vehicle anchors. Most forward-facing child safety seats will also have a top strap (tether) that attaches to the top anchor in the vehicle.

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