[Fungus]

Must retain same sound signature, forward mids, small sound stage, excellent instrument separation and bass. 
Must be universal fit
Detachable cable
Extremely durable
Not interested in either the new westone W or um pro series (reputation of drivers failing plus terrible built quality) 
Doesn't have to be very efficiency since I'll be listening to it with my jds labs c5 portable amp.
I'll be selling off my w3 and um3x rc to fund this purchase so it must be worthwhile.
After this upgrade, I'm not looking to upgrade so much be the endgame iem. 

 

[billybob_jcv]

Have you considered Westone customs?

 

[Fungus]

Have you considered Westone customs?

Not interested in customs for the following reasons: 
 
Can't share music with friends 
Expensive 
No resell value
My ears will grow and will need to resehelled after a few years which I just can't afford
Can't demo a pair without buying them.
Won't be able to find a good price for a used pair since I'll need have to get them resehelled. 
 
Please don't talk me into getting custom as I'm just not interested and have already made up my mind.  

 

[billybob_jcv]

lol - I was only asking...

You let your friends stick your IEMs in their ears? Ewwww....

 

[b0000]

stagediver sd3
 
joker's review on it seems to fit the bill.