Ok, taking a rougly 75 min walk with the SRH145m+ and a Fiio X5, I have to admit the sound improved over what I was initially hearing on the Kogan. It could be, and I would not be surprised, that the initial pairing is just a bad match, or perhaps an under-powered pairing. Using the Pop EQ setting, and listening at a volume that was appropriate for the vocals (for me and the album anyways), it feels like the treble was not nearly as far in the background (or faint) as it was on my initial out of box listening. The bass which before felt boomy and somewhat uncontrolled, almost like a lesser take on the XB500 bass, felt quite a bit cleaner and more controlled. It still wasn't a perfect pairing, but this second impression makes me want to continue giving it a bit of a try.
And yes, sorry for the early impressions, I know they're typically not the most accurate for anyone looking for serious information.