I would choose anything but Scandinavian Airlines, and that's from a Scandinaivan :-)

SAS is not very good. Poor service and expensive for what you get in return. OK, they get you directly to CPH from NY, but besides that they have nothing going for them.

The CC are often sour old women with no sense of giving service which is a pity as we (as a people) are not like that in general.

I'd defo go for LH, BA or AF instead or maybe even Finnair via Helsinki (even though it is a detour)...