Hi all, headfi has always been a great source of info for me, but this is my first post. I'm presently using a pair of Beyer DT 990 Pro and AKG K550 (driven by an Aune T1 DAC/AMP) and am thinking of upgrading. My candidates at the moment are the Beyer T-90 and Hifiman HE-500. I had previously been on a pair of HD555s, quite enjoyed them, and always thought I'd be a fan of a neutral sound signature, but have been enjoying the u-shaped response of the DT990 Pros (though it may be a little excessive). Usage will be with a wide variety of audio. Virtually all genres of music, gaming, and some movies. Sound stage is pretty important to me; I like to be able to feel immersed in the orchestra and pick out instruments when listening to classical, and placement is obviously important for gaming. I find I dig cans with a little more bass and treble, but that's not a major factor. I've found plenty of info on the HE-500, and that they seem to be a quite favorable set of cans, but haven't found quite as much on the T-90. One of my go-tos has been the battle of the flagships thread as the descriptions are clear to understand, and all through the same set of ears, but alas, no review of the T-90. So does anyone have experience with both? or any other recommendations?