Upgrade - sidegrade.. headphones set

Hello I'm new here so firstable Hi to you all
Now my question
I've these 3 headphones:
Fidelio X2
Sennheiser HD600
Hifiman HE400I
(Darkvoice and Meier corda Jazz amps)
I would like to replace the X2 with something better not spending more than 400/500 USD
Read around I considered : Audeze e EL-8 , the Beyer DT1990, fostex TH-x00 , HD700. but I'm very open to any good advice

P.s: i'm italian so I apologize for my bad english

 

Hello Jedima

You should post your question in the all advice thread. It is the best place to receive help.
About your question, take a look in the focal elear open box deals in several sites.
You can get them for 550$

 

My bad I was looking at that section but I didnt find it.. so please if a mod can close this one here I will post it there and ty David

 

Pretty much this, dude. I'd maybe recommend improving your upstream gear, or maybe swapping the HD600s for HD650s, haha.

DT1990 and HD700 are a bit painful to listen to, the latter moreso than the Beyers for me. Currently have HD650 and TH-X00 on hand, rather prefer the former now, especially for jazz and classical. Considering asking friend who'd lent the Senns for a permanent swap, but I could probably sell my Fostexes for enough for a better condition 650 second hand.

X00 Ebonies are pretty well balanced though. My only real gripe with them is a minor treble spike that makes certain tracks painful to listen to, and vocal presentation. Survivable though.

 

Hello friend, how you doing, good?
Here in Europe you can’t find very nice HD800 for 600-700 dollars. It would be a nice match with the dark voice ymho. Have you ever considered it? Should try first because the sound is not everyone’s cup of tea