I've got the "Wallnut edition" and can't relate to the problems you are having GunGrave.
Bass is deep and low and the rest is perfect.
I've compared them to my Creative Aurvana Live headphones, and the bass of the Xe200Pro is even more powerfull.
It's absolutely necessary with the XE200PRO to have a perfect fit, i've used the rubbers from my Creative EP-630, since they fit me perfectly .
If you dont have a perfect fit, you'll lose a lot of bass.