WaahYou're quite right. Forgot these were open. I guessing the better compare would be between HD598s and these then? (Since they're in the same price bracket.)
IzuzoDon't have the K7XX, tried the HD598. So I dunno.
Got an amp to drive the K7XX well? If not you're going to spend quite a bit more compared to HD598 on a decent sale (was $110 two months ago, expecting it to fall to same if not lower prices during BF or holiday season). Something to think about.