I'm interested in purchasing the Shure SRH440 ($85) [Or possibly Shure SRH840 ($150) if the extra dough is worth it].
I'd like to compare the Shures to others that have been recommended by this forum: CAD Audio MH310 ($63), Creative Aurvana Live! ($95), Koss ProDJ100 ($55), and Superlux HD668B ($50).
Genre: IDM (electronic), Jazz, Video Game Soundtracks, some Rock/Alternative like Radiohead and Shudder to Think. I try to use lossless formats when possible, otherwise 320kpbs mp3 or the highest quality lossy format.
Sound signature: I think I prefer a moderately flat response, since I might use them for mixing audio.
Usage: I plan to use these for studying mostly (home and library), but also for mixing and recording (guitar direct-in to an interface, no mics yet). I may not use these for commuting. Although the ability to use them for travel might be nice, it is not a necessity, so perhaps cans that do not need to be amped are best, but in the future I might get into amping. I don't want the headphones to leak too much sound, but I also don't want to hear too much outside noise. I don't necessarily mean near total isolation.
Thank you in advance for any information/insight you have to offer; it is greatly appreciated.
The 840 is your best bet from that group.