Okay FWIW about the HE's:
I bought a 400. I think it's an excellent all-purpose can for home use. I use it for single player gaming on PC and Xbox, where it's driven by a Xonar DX and MixAmp respectively, and it's capable,...
I think an E11 might give you more voltage swing than your S3, that's for sure. But by the same token, you should rule out the E6--it isn't a powerful amp, and arguably more suited to IEMs where it displays excellent channel balance...
Caveat: I've never tried the M40 and the Galaxy.
I have tried the M30 and M50, so I think I can guess where the M40 is at. I would guess the M40 is a decent headphone, but far from audiophile; AFAIK it was made for...
HallidePisces: I haven't tried it in that config, but I'll give it a whirl tonight. Heh, might be a bit weird though--my mic is attached to my headphones! But yeah, I'll try Rear Panel speaker output + Front Panel mic in.
Oh. Uh, that's more or less the same thing that I'm hypothesizing, no?
Except I don't know if there's some software/firmware limitation that prevents the DX from simultaneously allowing S/PDIF out + Front panel mic-in.
HalidePisces, I'm not sure AKWintermute has any trouble connecting a card to the Front Panel. In fact, there's nothing in his posts to indicate he's even intending to do this. So, I'm not sure your post answers his question...
Hm. Well, assuming you have mic-in by the FRONT panel, maybe that won't be a problem?
Also, found this:
http://www.hardwarecanucks.com/forum/audio/48063-dual-onboard-xonar-dx-setup.html
Seems that S/PDIF out would be 2.0...