just got my ibasso d10 and out of the box with stock amps i can already hear the difference between the xm4 and d10 on my ie8's... its like night and day.
i'm using an apruresound resistance adapter with the ie8s connected to an ipod classic playing losses via qables lod and d10. looking forward to burning in the entire rig so i can begin to get a flavor for rolling opamps.
i can definitely say i had my first eargasm with this set up listening to buena vista social club at carnegie hall. i have listened to this same recording unamped from my iphone, from the classic with the xm4 and now with the d10. there is a definite audible SQ improvement in my experiences.