So finally I went to buy myself a pair of portable closed headphones and it was a total disaster ... the intention was to go cheap and get something like JVC Flats, but I ended up spending considerably more in a pair of ATH-ES55.
Phones demoed today included ATH-FC700A, JVC Flats, ATH-ES7, Beyer DT 231 Pro. To be honest, I am not even sure why I ended up buying the ES55 ...
I will say this though, on symphonic black metal, both the ES55 and ES7 did a better job. On the other cans, the aggressive guitars and drums sounded rather muddled. I sort of preferred to ES55 because it was a) cheaper, and b) less bassy (never thought I would say that!).
Maybe it is age - am I hearing less highs theses days? - but while 5-10 years ago nothing had enough bass, these days I find most budget cans lacking in highs. Together with bloated bass, it is not appealing. Still think the JVC Flats are good value for money though.