For the moment, I would rather enjoy two, or sometimes three
, sets of very nice mid-fi cans. It gives me a diversity of products that do different things. The most obvious is open and closed sets. You can cater to your mood with a colored and fun pair and have a pair that are more neutral.
Ultimately I'd consider going with one flagship model and sell off the rest. I have a special affection for the sound signature of the lcd2. I could make it my one pair of headphones based on the sound signature. The problem is that they are just too darn heavy to be my everyday pair. Based on comfortable flagships: the he6, lcd series and even the he500, 5le are too heavy for a single everyday hp for me. The he400 is the max weight that I'm comfortable with.
The only hp that really appeals to me as a flagship that I'd like to own is the he60, which is now out of production. The last possible option would be a Stax setup. Wait, the Stax has a perfect weight and comfort level with an other worldly sound signature. Now if I only had about $3500.
the he-5le is lighter than he-500. should be about he-400 weight