So if you actually know a bit about these, it's always better to ask a more specific question. Nobody wants to bother with a "which is the best" question with no context around it. Just a tip for next time.
As I haven't heard the Senn's, I can't comment on which is better for competitive gaming. I'll make a bold prediction, though, and state that you probably wouldn't be able to tell the difference in a blind test. Just get one and enjoy yourself.
I already own all 3 headphones.
I bought the X1's and HD558's brand new and the HD595's second hand.
The HD558's should be arriving tomorrow. I have been using the 595's for 2-3 months now for competitive and the X1's for music/movies only.
The 595's are far better for competitive gaming than the X1's.
I was told I could mod 558's to 598's but I now believe that isn't true, or that the mod makes their bass loose and it's better stock even though soundstage improves with the mod.
The fact is I want to get rid of the 595's as I bought them second hand. I was wondering if the 558's would be better/worse or the same as 595's, when stock without the mod.
I paid £15 more than I did for my 595's for brand new 558's. The X1 cost me the same as both of those headphones combined brand new.
I love the X1's but for competitive gaming they suck compared to the 595's.
I suppose I will need to just test them for myself and see but apparently the 558's require 100 hours of burn in before they really open up and sound their best.
I suppose I should've just asked for competitive gaming what is better the HD558's (stock) or HD595's?
I should of also maybe asked for opinions on modding 558's and whether or not I should mod them?
they say HD558 should be left stock and it's better than the HD598 for gaming, music and movies but I think that's because the HD558 has more bass than the HD598's.
Either way I think they will be my new gaming set and sell the second hand HD595's meaning I "upgraded/sidegraded" to brand new 558's for £15 if I manage to sell them for what I paid for them.