Headphones vs full range speakers

I've never had any really high end headphones. I had like a $500 pair of Seinhauser earbuds for a while. I thought they sounded really good even pushing off a phone. Question is who has gone from listening to speakers for your main listening pleasure to headphones or vice versa. Can get something like the top of the line Focal Utopia headphones while pricey they are in line with "mid grade" speakers. 
 

I don't entertain often at all and the wife does not listen anymore. Just started thinking why not simplify and get some kick butt headphones.