Thanks for all the great responses.
I've done a little more research and the choice is only getting more difficult. I found some audiophile forums (
http://www4.head-fi.org/forums/forumdisplay.php?s=&forumid=2 this one was the best) and went through searching for posts and threads related to gaming. This forum has some VERY knowledgable folks about this topic, but oh my god, we have some serious stuck-up power-users. Hahah if you don't have HP's that are professional quality with a $1000+ amp then you can't hear a thing according to some of these folks.
The 280 Pro's got a lot of nods. The HD570's were virtually ignored in favor of either the 497's on the low-end, or the 580's, 590's, and the 600's. (The weren't really talked bad about, they were just hardly ever mentioned.) There are tons of Grado fans, but most folks again agree on the fact that they are uncomfortable and ugly. Sony V6's and just a couple others were in contention also.
I was leaning towards the 570's in large part because they look and are reviewed as SO comfortable. Comfort is key to me. How are the 280's?
Lastly, and most important, it has been very hard for me to figure out how well all these hp's perform in giving the listener positional cues. This category alone would sway me from one set to another, so it has been frustrating for me to find so little information on this topic. I guess there just aren't a whole lot of gamers playing on good quality headphones?
Lot's of folks are praising the 590's as one of the higher quality Senn sets that does NOT need to be amped to sound good. New I can find them a little less than $160. This is more than what I wanted to spend, but if I knew they were fantabulistic in comfort and performance and would last forever I could convince myself to go for it. Any experiences out there?
Thanks for all the responses, and any future ones,
Adso