I have had my DX90 for a number of years and have been mostly pleased with the sound and usability of it. I have read a lot about the newer DAPs though and am wondering if I am loosing out on a more sophisticated experience. I use these headphones: PSB M4U1, Audio-Technica ATHMSR7, Phillips Fidelio X2, Sennheiser HD-598 and Hifiman HE-400i. When I'm travelling I usually take the PSB M4U1 because it's pretty easy to carry (it's foldable) and the sound is quite balanced so that it fits most genres of music. However, I have been using the Hifiman HE-400i for most of my home listening but have read in at least one review of it that the DX90 doesn't bring out the best in them. I have personally experienced that the soundstage of these headphones is a bit too narrow for my personal taste and they really don't work well together with music that is very dense (specifically Devin Townsends Music) and was wondering if it has something to do with DX90. I do have a SRT microstreamer (USB DAC) and a Chord Mojo but I cannot really hear any clear difference between those two and the DX90 other than that the DX90 does seem to give more bass punch. I like the DX90 but would like an alternative player with a different sound signature. I have looked at other iBasso players like the DX120 and DX150 but it seems like the sound signature of these is similar to the DX90. I'm not looking at getting a DAP that is really expensive. The upper limit is about £600 for me. So the players I've read about are: iBasso DX120 and DX150 Cayin N5iiS Astell and Kern AK70 MKII (2nd Gen) HiBy R6 FiiO X5 3rd Gen (X5iii) Pioneer XDP-30R Do you have any recommendations based on the headphones I have? Thank you.