I've had a lot of fun reading through this thread. Here's my brief list:
3. T5p (modded)
I happen to agree with him as well.
The HE-500 are one of the absolute best at it's price and under $1k. You can still squeeze so much out of it by upgrading your amp and dac. No need to rush to summit-fi phones, you've got something wonderful there.
1. Still looking for #1.
Started a thread on the subject here http://www.head-fi.org/t/734599/oh-no-m50-7506-honeymoon-already-over-now-what
2. V-Moda M80: Toss up with the M50's. Only pulls ahead because they are stellar portables.
3. ATH-M50: Great for casual listening but not good enough for mastering.
4. MDR-7506: Great highs, tight bass but too scooped.
5. HD-280: Great isolation for home studio, not my favorite audio.
1.) AKG Q701(tie): Hauntingly beautiful sounding and highly addictive on my system. Some reason I like this headphones sound better than the K712 despite it being brighter. Smooth, grain-free, dynamic, great imaging, great depth, deep powerful yet very tight bass, beautiful mids and vocals, and a massive 3D soundstage. Can cause shivers down the spine and goosebumps. Sounds good on all genres when amped properly. It's very system picky though and a tad hard sounding at times.
1.) Sennheiser HD 600(tie): Another hauntingly beautiful and addicting sounding headphone on my system. A bit darker and more laid-back with softer dynamics, but also spine-shivering and goosebump inducing. It's not quite as fast and detailed as the Q701 and isn't as good in terms of imaging and soundstage. It does have the upper hand in terms of neutrality, naturality, and timbre though. I consider this headphone every bit the Q701's equal. This is another genre master.
3.) Beyerdynamic DT 150: This is the best closed-back I have owned. Has a good soundstage, big powerful bass, laid-back sound, good imaging, is very transparent, clean, detailed, etc. and I consider it in the same league as the two above. The reason this is third is because it lacks the texture of the Q701 and HD 600. It also doesn't portray musicality and euphony of a system or recording the same way as the Q701 and the HD 600 do. Sounds good on all genres and is the most forgiving and easiest to drive full-size headphone I have.
4.) AKG K612 Pro: This is basically a less refined, less warm, and more spacious sounding AKG version of the HD 600. It's a great headphone but doesn't quite have the resolution and refinement as the three headphones above. This headphone also sounds good on all genres if amped right
5.) Fostex T50RP: Has very little grain but has horrible resonance and is a pain to find right system for it. Needs modding to sound it's best.
1 - LCD-2
2 - Sony Balanced Armature Headphones - XBA-4 (for portable use)
3 - Sennheiser - RS 180, wireless for TV and computer via Audioquest Dragonfly.
Completely newb to high end audio but here's mine:
1) AKG K712 Pro - goosebump inducing especially on DVD movies. Very warm sound but can become cold and very analytical depending on recording and amplifier
2) Sony MDR-7506 - for playing piano
3) Sony XBA-1 - home / office IEM
4) Panasonic RPHJE120 - travel use