IMO IF we are looking/willing to spend 50m+ on individual players to build a new spine, then those players should/need to be fit for purpose to contribute from the off and not be needing to be developed into the style or role we require. Whereas needing to adapt to a new league is something else entirely.
For mind players like White and Maddison are the former (even if IMO the CAM position and role is determined upon the type of CF), where as whilst Isak looks a talent I don't think he fits the role as being a linking forward, and neither does PEA for that matter. I'd be far happier if we were looking at the likes of Silva and Vlahovic, unless we are looking to change the role of the CF and our patterns in attack.