I've decided to grab Brainwavz M2 as a stopgap measure. Unequalized, they remind me of Sennheiser IE7 sans their soundstaging. (which is 3x as expensive)
The competition were Nuforce NE-700X (metallic), Fischer Audio Eterna (HORRIBLY metallic) and Westone 4.
The main funny issue is that they're a bit depth dependent - shove them in too deep and they lose all soundstage width.
They respond pretty well to eq and are better extended than GR07 at the bottom end, losing only a bit at the top.
Apparently they're the most linear with small Comply T-200.
Slight hint of boominess in bass even after eq - however great texturing anyway.
Brainwavz now includes some funny Comply S-series (cheap hard foam series? inferior series?) and hybrids as the tip set. Nothing else is different.
Superior value all around.
As to the Westone 4, I was a bit underwhelmed. Yes, they are perfectly clear. Yes, they're very well balanced. Is it worth the price? Not in my opinion.
They do roll off at subbass just about the same as Sleek Audio SA6 I used to have and have a slight hint of sibilance.
Fit and comfort are pretty good. Texturing is very good, however they suffer from short bass decay. (but impact and amount are almost fine)
So, the question of "where to go next" is still unanswered...