What scooter to buy after a mini micro?

[Taichimum]

My Ds is growing out of his mini micro and wants a 'big boy scooter'. He is 4, but very agile with excellent scooter and bike skills.
Any recommendations of a good performing scooter for this next age group?
many thanks

DS has this and we have been very happy with it. He uses it a lot and it has worn well.
Quite expensive, but I guess it depends how much he will use it.
Also folds flat so easy to chuck in the boot if need be.