Finally got a bargain, fidelio x3 for under £80, remember they were £299 at the time, i can't wait to see them against x2hr, which i also bought for similar price a year or two ago!
2023.08.26 update: best sounding was with: original pads + balanced 2.5mm way + Hidizs S9 Pro USB DAC, as with 3.5mm socket on LG v60 i would have needed to force high impedance mode, which i was too lazy to do, even if i could; steelseries net like pads - increased bass, sometimes even more than you would like to have, i guess, and pleather pads - completely too much bass for my likings, unbearable, haha, i would either return to original or net pads
My state after having both and x2 and x3: i could have stayed with x2 and returned to original pads, net pads are ok for x2 most of the time though. If i didn't have x2, and got x3 first, i wouldn't have looked at x2 at this point! Not very impressed with x3 over x2, but i love details, clear instrument separation, less bass than x2 is not a problem, spaciousness, that wide soundstage is good to have
Still have to test x3 with Fiio K5 Pro, the only highest powered DAC i have with my PC!
Fiio K5 Pro Update. Handles x3 very well, much better than listening on smartphones, warm, not boomy bass, a lot of details, handles rock and metal very well