With a tough well made cable..
Look out for the hisoundaudio Golden Crystal.
Use with comply tips n u get a even balanced bass without sibilance in the highs.
I had fit issues as well - couldn't make use of the stock tips - had to find others in my collection before I could get a proper seal. I noticed the microphonics, but it wasn't a dealbreaker. :)
Mine came apart. But a little glue and they have been fine for over a year. Easy fix.
There is a set of Mage that has been on the sale/trade thread for the longest time - I thought about them before I got set up with my Heir CIEMs - I also liked the CC51 - they are my wife's office phones now (the white ceramic housing is oh, so stylish!)
The EarPods are good, but not that good. I'd rather recommend a Dunu Trident of Etymotic EtyKid in place of that. Or the Dunu Detonator.
Put some foam pads on those EarPods and they improve quite a bit......actually, a lot.
+1 for fx40. These IEMs never get the love they deserve, personally I find them better than SHE3580
UE700 is discontinued - they almost cost as much as TF10 at Amazon! I have never heard the 600.