[pseudohippy]

I do not like the SA6 paired with the penguin. On high gain that amp seems to overdrive the SA6 very quickly and muddles the sound. I suddenly get a hint of sibilance and flubby bass. When I use low gain it just doesnt drive the 60ohm SA6 enough, they just dont seem to shine on the hight quite the same.

Now on the cheap, I like the SA6 and the Fiio E3 very much, it warms them up and adds some bass. It doesnt help with soundstage or SQ in general though, just creates a warmer tone and more bass.

Those are the only two amps I own though. I do love the Penguin with my SE530's though, just fantastic combo. The Penguin is actually good enough to improve SQ, sounstage and eliminates the hiss my Cowon D2 SE530's have when together alone. Plus with my D2 it is really nice having a volume control.