Amp/DAC configuration/upgrade time

First a rundown of my current setup:

Macbook Pro 2011 >> Nuforce Icon uDAC >> Firestone Cute Beyond >> Audioengine 5 speakers, RE0, Audio Technica AD700, Westone 4

Ipod Touch>> LOD>> GoVibe 5 portable amp >> Westone 4, RE0, AD700

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So, I'm looking for help figuring out how to change/upgrade/tweak my setup. I don't know that I noticed much of a change using the Cute Beyond vs. not using it, so maybe something in my chain isn't ideal. I'm looking for some advice and opinions on what route to take to improve my configuration, whether that means selling the Cute Beyond for a different amp, getting some different combo of amp/DAC, etc. What would be a good exchange for the nuforce/Cute Beyond? I'll still use the Go Vibe for portable, but would like something that would benefit all of my sources and headphones.

Thanks!

I'm wondering if I couldn't possibly replace my Cute Beyond/udac with an ibasso product for an increase in quality. Something like the iBasso D10, perhaps?

Or maybe the Fiio E7 would be good for when I'm using my ipod/mbp with headphones?
Edited by rbf1138 - 4/7/11 at 8:15pm

Alright, so I'm narrowing a bit more. E7+E9 combo vs. iBasso D10? They'd perform the same functions, correct? I figure I can use the E7 on the go, and the docked combo for home use and with the Audioengine 5s.
Edited by rbf1138 - 4/7/11 at 8:45pm

Yeah, but I'm also talking about using them with the speakers and fairly expensive IEMs like the Westone 4, CK10 and Fischer DBA-02...I don't want more full-sized headphones. I'm also not real satisfied with the Cute Beyond.