Just bought our 2 yr old a second hand Kokua jumper balance bike
http://www.likeabike.co.uk/m3b0s337p8/LIKEaBIKE-Jumper
I’d say it equal to an Islabike, same price, no brake (optional extra), lighter and it has suspension (gimmick in a balance bike?).
He’s currently out in the back garden pottering round on it.
As they don’t have the same well know status and cult following as Islabikes you can pick the up on ebay for a bit less than the Rothans go for.
Edit: Looked at the early riders too, nice bikes and in the Islabike/Kokua quality and price bracket. But I think they are not as good for young(~2yrs)/small kids, maybe for 3 yrs upwards.