At this point it's more of an interest check as I am having second thoughts about selling them (although I already have several cans and one pair of ears). Haven't tried the K167 with an amp but out of a dap, they sound noticeably thinner than the MDR-1R and even my DT 1350. That said, they have amazing soundstage and detail. The instrument separation and clarity is on another level. Right after I was listening to the K167, I put on the 1R, and at first listen they sound slightly muffled in comparison. Now that I've had the 1R on my head for a while that muffled feeling is gone and I adjusted to their sound sig, which is thicker and warmer overall. More weight to the instruments and better bass punch than the K167 to my ears. Overall the MDR-1R is more enjoyable to my ears because its better timbre - I'm not even sure how to describe the coloration of the K167 (think if Ultrasone and the DT1350 adopted a baby, that would be the K167 - detail monsters with very wide soundstage but a bit odd tonally).
Again, I don't have a proper amp at the moment so take this with a grain of salt. Oh and btw you can refer to me as 'her' next time. I know I know, it's hard to tell who is male and female around here.