Must be the day for contemplating car seats!

We currently have a babylove ezy combo. When I was giggling earlier, it said it was good to a certain height and 26kg. Most others that I looked at didn't have a weight range though. DD is tallish and solid built and I'm now wondering if the car seat is going to last or whether we need to update. Again. I'm not one to want her out of a car seat before necessary even if she is bigger than average kids her age. She is still too little!