I find the DT770 to be more comfortable than the other headphones you listed. I wouldn't call the other phones uncomfortable, but for me, they can't touch the DT770 in comfort. I owned the QC15 for awhile (gift from my med school to compensate for loud construction). My experience was similar to...

As far as things go at best buy, I didn't find anything that was really in the same league as the ESW9's. They are just a wonderful sounding headphone to my ears. I have always been opposed to the on ear design but I found them to be quite comfortable as well. I totally understand if the design...

I snagged a pair of AD700's for $60 on ebay. Watch some auctions for a week or two and I bet you can find some below $80. As far as the bass is concerned, I find it to be very nice. It doesn't have massive impact, but it is there. I find it responds accurately to how the music was recorded.   

Sorry, for the late reply... med school finals tomorrow so I have not seen the light of day for a while haha. If you don't mind going the used route, you can easily get the mixamp/ad700 for under 150 euros. Just watch ebay for about a week. I feel that is the absolute best gaming setup for the...

Check out this thread: http://www.head-fi.org/t/534479/mad-lust-envys-headphone-gaming-guide-updated-8-11-2012-images-added   I originally wanted a true wireless headset, but decided to get a mixamp (for virtual surround sound) and AD700's simply because the sound quality is worth dealing...

I think you will really enjoy the 598's. Also, I'd look into the antlion modmic. There is no modification to the headphones involved and it sounds better than any astro/turtle beach mic I have heard. Its a beast setup. 

I like the new color schemes, but that cable would have to go. 

There is always the Labtech LVA7330 option. Not as easy or as good of quality imo, but they are available immediately.    http://forums.majorleaguegaming.com/topic/141748-fragtalitys-audio-technica-ad700-boom-mic-mod/

I lived in an apartment building that was built in 1919 and had been completely renovated. As nice as it was, the walls were still paper thin. I could hear peoples tv's that were using just stock speakers. Needless to say, I couldn't run my speaker set up. I guess sacrifices must be made for a...