[labou]

I've narrowed down my search to these three, but I would like some input before I make my final decision. Thanks

 

[fraggerz]

RE0 if you can clarity and transparency.(RE0s have great highs too)
S4 for bass.
ER6i for great highs and insane isolation.

 

[silverkaze]

I have the re0 and image s4, coming from a personal experience, the s4 does have a lot more bass impact and it sounds thicker. On the other hand, the re0 sounds "thin" and it is not good for walking around with. So I use my re0 while I am studying as it provides great details and clarity while not having heavy bass to interfere with any of my studyings.
And I use my s4 when I am travelling, but if I were to pick one, I would just get the s4 as it is good for both home listening and on the go.