For anyone interested - I just posted my Delta V2 review - in amongst it is comparative graphs for Delta V2 and Sabre.
http://www.head-fi.org/products/trinity-delta-v2-dual-hybrid-iem/reviews/16080
On the Sabres are you able with filters to tone down the treble? I tend to be treble sensitive.
I have these on pre- order and wonder if I made a boo-boo.
If Bob describes the Master 4 as a delta 2 on steroids sounds like I would be better off without the Sabre.
I'm sure Brooko will answer when he has had some sleep , but the treble on the Sabre is not hot.
Really nice review @Brooko, thanks a lot. I'm impressed on how much info you got there. And so wonderfully exposed

I was actually worried when i read the review. That spike scared me x) i'm fine the upper mids, the one around 9 kHz is the one that is catching my eye but i know the graph alone doesn't tell the whole story. I was also surprised because when i tried the Dunu DN-1000 there were spikes in the treble region which are not that noticeable from the graph (at least at a great amplitude)
Well i know i'm sensitive to my treble, but i think i'm gonna be ok with the sabres, we'll see. Still trusting Bob

Edit: Btw Bob, is the Phantom Air still heart shaped?