Oook.
EQ in Poweramp is not difficult, it is a very normal EQ, not parametric like in Neutron.
You just move the sliders up and down. You are right that if you intensively EQ, some Headphones will sound worse then before. But you can take a couple of reference tracks which you know very well how they should sound, and move the sliders one by one, all up, all down, so to see which kind of sound goes in that frequency. So you learn which slider move, and how much, when you need to increase or decrease a certain kind of sound. If for example there is dullness, you are probably going to decrease low-mids and some upper-bass. It there is not enough warmth you can increase some middle and upper mids. For Punch mostly mid and upper bass. Rumble Sub Bass.
Which frequency is what?
I have learnt it online:
http://www.head-fi.org/t/621434/difference-between-upper-bass-mid-bass-and-lower-bass
http://www.thegearpage.net/board/showthread.php?t=330607
What all those terms mean?
http://www.head-fi.org/a/describing-sound-a-glossary
(I should probably put these in my first post)
Anyway, let's say that you will not EQ.
For your Music I only see three very good possibilities now among what I have tested:
Fidelio M2BT
UE9000
Plantronics Backbeat Pro.
The Fidelio and UE sound quite similar, with a nice warmth, and soft, round rumbling bass.
They still have anyway enough punch for Techno and similar.
I would say that the UE could have a bit more power in the Bass, a bit more punch while still having lot of rumble.
And it is a bit warmer. The Fidelio have some highs more. Which I personally like, it is more balanced so, while still being powerful (it is already no secret that I am no fan of neutral uncolored headphones, although I like all frequencies to be well represented).
The Plantronics would be a bit faster bass, less rumble. But not dark. When I wrote dark I had in mind the Urbanite and the Beats.
No, no, the Plantronics is very nice bass. It has got a nice mix of punch and rumble.
It is not so warm as the other ones, because it makes highs shine particularly well, which gives them a fresh, open signature.
Some people feel that they have too much highs when not EQed. I like that personally. You can always EQ some highs away. But with other Headphones you notice that even when you increase the highs you do not get that detail of the Plantronics...
Apart for the AKG K845, very very nice Highs. Even more detailed than the Plantronics. But too neutral and bass lacking (no matter how much EQ) for my tastes. Surely not a Basshead headphone
The Fidelio is probably the more balanced one. Like also the grafics in the review of Digitalversus show.
The UE is the warmest.
I would say, the UE is the most Dubstep one among them all (but can also do the other things well)
The Plantronics the most Hip Hop and techno (but can also do the other things well)
The Fidelio the most do it all. With the advantage of a much better portability.
Given all what you say, I consider the Plantronics to be the better choice for you.
Also because they cost more or less 200, while the UE cost 270 and the Fidelio 350, which, for as much as I love them, I consider WAY too much. Really overpriced. But well. They just came out now, in Amazon there is not yet a single review (I am going to write mine now). The UE are 270 after YEARS. They costed much more. The Plantronics also went down...
The Plantronics fit loose enough for big heads but have small cups for big ears, so, perfect for you.
Fidelio could be tight on big head. Logitech, a middle way.
If you buy them, ask David here in the Forum for suggestions. He own them now and he is kind of expert on software updates for them.
Let me know if I answered enough or if you have more doubt