The Triad L3 is my fav so far with the 120s. I hook it up to the PSU and it sounds even better. For portability I use the Tralucent T1 amp. I preferred this amp to the internal amp on the DX100 :). I use mine with the Spiral Ear SE5 and the Tralucent Ref 1. But it pairs good with all my IEMs including the FX850 and Suis.
You'd think with a custom fit you wouldn't need these things . I used ear lube initially unil my ears adapted to the SE5s. It can still be used to help with seal/fit/comfort. Just make sure not to get into the sound tubes.On the Ref 1s the Spiral dots still take first place. The Custom fit sounds interesting too.