I have the Mjol and Gung stack in house right now and honestly for the $1500 new, less used... I really like it. They are different than the GS-X mk2 and PWD2 to be sure but it's not the obvious drastic change the price tag might call for. Now if I do bite the bullet and go the ciem route it's academic but for now colour me impressed.
Which is also to say the reasons I disliked the Mjolnir before... completely the fault of the W4S DAC2 :P On both the PWD2 and Gung it's not super aggressive or top tilted. It is a little more forward than the GS-X mk2 but in that they ride either side of the dead/alive line where dead centre would be perfectly natural if that makes sense.