RockStar2005
Headphoneus Supremus
Well it looks like my search continues, as I was under the impression the Fostex TH-X00 were CLOSED back. Apparently they are actually semi-closed, so these won't work for my office environment. Might just have to stick with my ATH-M50x.
I dunno man. What's your budget range? How high can you go? If you can go higher, I would recommend the following (all from my list):
$782 Beyerdynamic T5p Tesla (1st Generation) (That price is on U.S. Amazon. I believe these to be superior to the 99 Cs, but they are more pricey too.)
About $810 (with shipping) MrSpeakers AEON Flow (These are what I believe to be the BEST headphones you can buy for under $1000 ((or even higher perhaps??)))
I would research both of these and then see. If they are too high, then I dunno man. lol I only have a couple headphones in my $300-$500 range for closed-back, and they are the 99 Cs and the MJ2s. lol Prob better off getting the 99 Cs to be honest since those cost way more.