Car seat stress

[Tanito279]

DD will be 3 in September. She's 1m ttall and 16kg. She's just about grown out of her stage 1 seat but I don't know which one to get next. I looked a britax 2-3 seat but by the time I'd shut the door with DD strapped in and walked to the drivers door she already had her arm out and was rocking back and forward hard to make the seat bang. I've looked at the isofix 123 seats but a lot of reviews say you only use the isofix in stage 1 (and so few have top teather anyway). I don't know what to do now. We're on the motorway a lot so I want her to be safe and money isn't an issue for something this important.
Please can anyone recommend a seat?

You could ring the in car safety centre for advice or I joined a facebook group called car seat advice for mummies and daddies. I think they are very busy so don't respond straight away but if you give them your DD height and weight and the car you have they can recommend seats.
My DS2 has the Britax Two Way Elite. I think you can only get it from the in car safety centre and they fitted it for us. It can rear face till 25kg but there is the forward facing option too. We're pleased with it so far.
There is a car seat forum on here too. I found it so confusing choosing, too many different types.

The group one seat should be OK a while yet. They are up to 18kilos. My dd is 110cm and hasn't outgrown hers yet.

Which group one seat have you got? They're supposed to last until approx 4 I think

I would also say you might not need a new one quite yet. My DD is older, taller and the same weight and I'm not planning a change just yet.
Agree with getting in touch with the In Car safety centre. They're expert in this field.