convertible seat rec

[SDNikki]

I need to help my SIL decide on and find a convertible seat for her 14 mo 18 lb DS (he was a preemie and is pretty small). She has an infant seat that he not liking being so reclined in and a marathon for the primary car and need a secondary seat for another car. She wants to spend as little $ as possible but not have to buy another convertible seat in the future (so durable). And of course safety is of upmost importance.

The main issues are:
DN is so small and needs to fit in the seat comfortably and safely
Seat needs to last a long time
Needs to be easy to use.

What is recommended these days?

[Joolsplus2]

Evenflo Triumph Advance...it's like a Marathon, will last till booster age, 17+ inch top slots, 50 pound ff harness limit, 35 pound rf limit, but only $129! Only issue is the knobs can be tricky to use, and may take some getting used to.

And I know it won't last as long, but the Safety 1st Uptown also has tall top slots, should still last him to age 4ish in a harness (40 pounds, 16 inch top slots), and is comfy and easy to use and only $89. Cosco Scenera is so cheap she won't care it barely lasts to age 4, but it's very easy to use, and only $40 (great for air travel, too!)

:)
Julie CPS Tech and mom to 3 in seats
http://www.cpsafety.com/articles/RFAlbum/SarahMA.aspx

[SDNikki]

Hi Julie!

That's exactly the info I was looking for. Thank you so much.

Now, where did you get those prices at?

Thanks again!

[Joolsplus2]

Walmart (scenera and uptown, standard and sale price, uptown is usually 99) and Target (scenera and evenflo), I believe, the Evenflo is at Babies R Us, too, though they may have a 'fancy' version that costs more.
Julie CPS Tech and mom to 3 in seats
http://www.cpsafety.com/articles/RFAlbum/SarahMA.aspx