Hi Guys, First time poster, please be gentle. I have been doing a lot of Google/Head-Fi Forum based searching to determine the best options for the best possible closed-back set-up between the 2k-3k AUD range ($1596-$2393 USD) to replace my current portable solutions. I bought a pair of Shure SRH-1540s based partly on similar research but find that they sound bad at high volume even though I do like them a lot. I figure it might help to include the type of music I'm wanting to mostly listen to and some of my other preferences. I have eclectic tastes so something versatile but with a focus on Hip-Hop/R'n'B (here sub-bass presence is more important than 'slam', something the SRH-1540 is good at until it reaches too high a volume), alternative rock and indie and electronic music (again, deeper is more important than impactful). The SRH-1540 has a great sound signature and is surprisingly the headphone I think has the best soundstage compared even to the two open back models I own, but I'm looking for better bass authority at high volumes and a brighter sound since the SRH-1540 to me sounds rolled off and muted and can be boring and clinical at times. Most importantly, it suffers greatly at high volumes, hence the reason I want to upgrade. In addition to the SRH-1540, I have Momentum 2.0 which has a somewhat congested soundstage, the bass is lacking and I actually find the treble fatiguing on certain high pitch drum sounds which led me to purchase the ATH-M50x as I found it terrible for rap/hip-hop. The ATH-M50x sounds muddy and veiled to me although I really do like the bass on it and the treble is OK, but the mids are lacking probably more so than all of my headphones. I have two pairs of open-backs, the Grado SR225E apart from being horribly uncomfortable sounds nice but despite being completely open lacks soundstage and is extremely bright without as much bass as I might like. The most preferable headphones I own are my Oppo PM-1s which I really like the bass presence on and can get very loud and maintain perfect composure. Soundstage again would be my only complaint. So yeah, TL;DR I am looking for a closed-back headphone with great bass authority, a broad soundstage (well, as much as you can with a closed-back headphone), a bit brighter than the SRH-1540 for excitement and is able to be turned up loud. My shortlist are the Audeze LCD-XC, MrSpeaker Ether C Flow, Fostex TH900 and possibly the HiFiMan Edition X v2. Let me know you're suggestions, if you need any more info and thanks for anyone who can lend a hand.