What can I get that's just a little bigger than the MA, something that I can use for just another couple of years? I think my 5-year-old is too tall for her MA, and I would like to get something that she can use for about 2 years (harnessed, preferably, and less expensive than the Frontier) and then pass on to her younger sister, and upgrade to something bigger at that point.
The reason why I ask for these very specific parameters is because I should've done something similar for their convertible car seats a few years ago. I could've saved some money by getting a RA for my firstborn, passing it down to the second, and upgraded the firstborn to a MA at that point. And then at this point, when my firstborn is ready to upgrade to something bigger, my secondborn could take the MA.
They're only 2 years apart in age, and so the issue of car seat expiration is not really relevant, I think, as long as I don't buy used.
I hope my question makes sense...