I've no doubt this receiver is good but definitely wouldn't take this as it being definitively better than another. That guy does interesting reviews but I've never seen him say something wasn't up to much
Power is like money, it's better to have more of it than less. Elacs are inefficient speakers plus they are 6 ohms. The Denon will be okay but will struggle at louder volumes.but so will any other low wattage amp.