Sorry that only stands for KEF but it gives an idea for what a manufacturer thinks.When I researched my speakers I remember seeing that KEF suggested pairing an amp that output 60-110% of the upper limit on the recommended amp range of any speaker. It's a very general rule of thumb but it seems sensible to me. So the Lyngdorf would make a very good pairing with the Dali's by that measure - I'd certainly like to give that a listen
Some manufacturers make speakers capable of handling 300W yet they were developed and work fine with 8W valve amps in mind. So yes it's worth getting to know the manufacturer.