Can anyone help with some recommendations?

my partner and I are moving to Denmark from Australia mid year, We are Currently with Qantas FF and have the affiliated Qantas credit cards,

We are thinking about using SAS EuroBonus and an affiliated card but I am not sure if it would be the best one to go with? are there many options to choose from in regards to credit cards and SAS?

Or is there another FF scheme and card that can be used,
that anyone would recommend over SAS and EuroBonus

Thanks