Hello, I'm a complete noob who's been using hd598 as his first mid-fi for a while without any amp/dac. I've been doing fine with the hd598's, but I thought that I'd buy a new pair of headphones for a change of mood, I mostly use my headphone for games and general music, but I think I got to like vocals a lot because the hd598 makes them really pronounced. I've already done some research and ordered a pair of dt770 pro's with e10k from amazon, which I've been testing for the past week. While I really like the isolation, I'm not quite sure if I like the less pronounced mids and the bass sometimes clouding the mids. I've researched a bit more and found out about he-400i. It seemed that it was very expensive until a few years ago, but it's only ~$270 now, which is ~$40 higher than the dt770 in Canada. Based on reviews, it seems that it's an upgrade from the hd598. I'd like to try them too, but I'm afraid I've already gotten too many things to return to amazon, including the dt770 80Ω version which I decided to return in 250Ω's stead, and the e10k, because I just impluse bought schiit stack for future proofing. However, if the he-400i is really good, I'll try it out despite having to return 1 more item. So I'd love some insight from you guys on he-400i compared to hd598 and dt770. I'd also welcome any headphone recommendations under $300 comparable to these ones. Please help a noob choose a pair and thanks for your help in advance!!