Football (soccer) club recommendations

This Q is to the soccer mums and dads of Adelaide....

What club would you pick for U9 mini roos for a very ambitious little footballer who takes his craft seriously?

My youngest has played school soccer for a few years but is now in an elite academy stream. Trying to decide between following clubs for 2027 winter:

>Cumberland United. Invite only so not guaranteed

>Adelaide Comets. Registered for come and try

>Sturt Lions. Know little about this club

Wanting to find a place where its enjoyable but right amount of challenging. Hes progressing very well with the academy soccer coaching