I'll add a bit to this discussion. I know I've spoken with you about this before iponderous - but I've had more time switching between the SE530's in the gym, and using the JH13's at the office. Going back and forth over the last 1.5 months has really highlighted the differences for me.
First off, knowing what I know now - I don't think I'd side grade (or small upgrade) universals once you get to the SE530 level. I think the SE530 is a good earphone - but when you really get a lot of time with something quite a bit better (JH13) you are more able to identify weaknesses.
I guess it isn't a big deal if you can sell a high end universal and get your money back out of it. It's always cool to try something new. But, from my experience with the Westone 3 and SE530, I don't think you will find one which is better ENOUGH to justify the hassle of switching.
First off, after living with the JH13 for a while, the SE530 is not a monitor. It's a consumer grade recreational music listening earphone. The frequency response of the thing sounds well balanced to me - but the clarity is lacking. Though it does also have rolled off highs, I actually don't find this to be a big deal unless listening to stringed instruments, mostly classical music.
I think universals are really limited by their inherent universal design. You just have to go custom to get the type of sound upgrade you'd expect out of "the next level".