My friend is looking for a seat for her 3 year old. She would like to keep him in a 5 point harness for as long as possible. My question is what are her options? I know about the Britax Marathon, Decathlon, Boulevard and Regent (Regent being the best choice for her I think) and the Sunshine Radian 65 and Radian 80 (but that is more $ than the Regent right? Why is that?) and the Fisher Price Safe Voyage (only goes to 55lbs right?). Are there any other seats that can be used with a 5 point harness past 40lbs?

She actually just bought him a Britax Parkway but I think she is going to return it so that she can get something that has a 5 point harness. He turned 3 in August and I know weighs more than 30lbs and is taller than 38 inches but I cant remember right now how big he is exactly. If money is an issue and she can't afford a 5 point will he be ok in this seat? Is it an decent alternate option?

Thanks so much!

Alissa