Hi Breanne!
Welcome to C-S.org
I very strongly agree with the previous posters about rear facing your DD as long as you possibly can. There are quite a few seats on the market that will accommodate RFing her for several more years (my 7yo DD would still be able to RF in our current Radian but she is in the 2nd% on the growth charts @ 44" & 43lbs). As she is petite, pretty much any of the seats mentioned above would give her additional time RFing but the amount of time they will do so will vary.
The Britax convertibles sold in the US probably won't give your DD a lot of time RF (maybe a year??) but they are super cushy & plush IMO. I don't think that it would be the safest option for your DD. So
personally I would only buy one of the Britax convertibles if you planned to buy another RFing seat in another year.
The Graco My Rides have nice deep sides that could give her extra trunk support. I like them in a lot of ways but they 1) take up a lot of room so you probably wouldn't be able to have more than one other person in the back seat with her & 2) can be challenging to unload & load a child into RF by the time they are your DDs size if they aren't able to help maneuver themselves into position. The loading & unloading is more of a challenge if you are standing next to the vehicle & loading her into an outboard seating position (i.e. next to a window/door) than if you are getting into the vehicle and putting them into a center seating position. This is particularly true if you have a taller vehicle (minivan, SUV, truck, etc) & are putting her in the vehicle while you are standing outside. I've bonked my DS's head many times doing this when we had the MR65 in our old minivan. If the any of above don't apply than I would recommend it without hesitation. Other than loading/unloading issues it's a great seat though.
I haven't had enough experience with the Chicco NextFit to compare it to the other seats you have mentioned.
My personal favorite RFing seat would be one of the Diono Radians. I'd suggest the Radian RXT b/c the headwings will give her extra support so that her head has less room to flop to the side.
The Radian is all around a fantastic RFing car seat. It isn't on any type of platform & has low sides which make putting her in & taking her out of the car easy even if you have her outboard in a tall vehicle. Since the Radian has high RFing weight & hight limits you won't have to worry about her outgrowing it anytime soon. For your daughter, I would use it as a RF only seat. it wouldn't be an ideal seat for you DD FF as it is pretty straight up & down FF in most vehicles. The only caveat being that it can be tricky to install in some cars (more so when installing FF though) if you have any trouble you can certainly post here or find a
CERTIFIED Child Passenger Safety Technician (a.k.a. a "CPST) to help you with installation and to
teach you how to install it yourself as well.
Whichever seat you choose, you will want to use it until your DD meets the RFing hight or weight limits of the seat. If you decide to buy any of the (US) Britax convertible car seats, I would plan on buying another rear facing car seat with higher weight & hight limits after she outgrows the Britax.
So, unless Britax starts selling their Swedish seats here, my number 1 pick for your daughter would be a Radian RXT.
