Well the burson has everything you mentioned and the main caracteristics: great soundstage good separation excellent definition better and more controlled bass etc etc but, for some reason I can't say..., I always go back to the stock oamp. Maybe it's just that for me, this player is not meant to be the most audiophile in sound terms -saying this I don't mean it sounds bad in case that anyone is thinking in that way... Just the contraire- and I find the stock oamp suits very well for that fun sound. The same happens with the paired headphones , I always return to use the kpp with the walnut. They're a very good match as you mentioned too. I don't know, maybe it's like returning to the energy and personality of the 80's in some way.