I know this is a week or so old now, but I have had or tried most of the car seats with a harness up to 25kg. I didn't have the Two Way Elite.
I had the Britax Traveller Plus which was awful. Very old fashioned. The straps twisted non stop - they used to take 5-10 mins to untangle before each journey which made by back hurt. Anyone who doesn't do this was effectively not correctly strapping in their child.
I tried a Britax Advansafix which has the most misleading adverts ever! My tiny child aged 3 was on the top height setting for 5 point harness use - he was only 15kg. My 5 year old couldn't get in at all.
There is also a BeSafe ERF seat which has a high weight capacity, but we had the same issue with height with that too.
I like the Diono Radian 5 BUT it weighs an absolute ton; needs a degree to set up; isn't as portable as it promotes (!); and the head support isn't that good if the child falls asleep. We suffered badly with head loll and I had to get another seat.
I have an Apramo One which works brilliantly although I struggle a bit with the recline because when I fit it, the recline is less than when outside the car. I find it difficult to fit too, with too much slack that I am constantly trying to resolve. It takes 2 of us to do the clips up at the rear of the seat. It is a big seat and my 21kg 6 year old is happy with it. It is currently in use.
I also have a Cozy n Safe Excalibur which is excellent for the price. Lovely fabrics, big seat, the best harness height of the latter three seats. It was easier to fit than any of the others. I think you would be pleasantly surprised if you got one. I definitely was! My eldest says it is the most comfortable of the last 3 seats. All these last three require a top tether.