^ Netforce, what are you using to drive your headphones? Regarding KC06/A noise floor, sounds like they have high sensitivity which results in background noise floor amplification. Consider you have no issues driving B3 pro, I'm just guessing you have a strong signal source to begin with. I'm experiencing the same using Hidizs AP100 and the best way to fix it is to use 75 ohm or 100 ohm impedance adapter - the noise will be gone.
I'm thinking about getting both KC06 and 06A, but heard 06A just a bass enhanced version rather than v-shaped with recessed mids. Others think otherwise?
Regarding Dolphins, even with a mod, they have a very powerful bass response, but I still find their upper mids to sound rather unnatural. Don't get me wrong, they have a fun sound and fun look, but after listening to all my Audio Technica (M50x, IM03, IM50) and Zero Audio (Tenore and Doppio) where you get excellent balanced mids with natural rendering of vocals, Dolphin sounds a bit off to me.