RojasTKDAfter having gotten a pair myself, I'd recommend some Dekoni or HM5 Sheepskin pads to bring out a bit more bass. With stock pads I found them a bit bass lean. The Sheepskin pads made them much more to my liking and turned these into pretty decent headphones.
Measurements: http://www.superbestaudiofriends.org/index.php?threads/massdrop-x-fostex-t-x0-measurements.4542/
Review: http://www.superbestaudiofriends.org/index.php?threads/fostex-t-x0-review.4552/