Been testing the ZxR again a little, it definitely seems to ignore windows control panel speaker settings in favor for Z-Series Control Panel (Skyrim that has broken positioning unless using 5.1 speakers didn't sound right until I turned on 5.1 speakers in Creative cpanel). For me my preferred setting is RCA outputs -> 5.1 Speakers in Creative control panel and only "Full Range" speaker options ("front left and right" and "surround speakers) both enabled and everything like SBX etc disabled. This gets me closest to onboard soundstaging. With onboard I then also used to turn "Front" volume level in "Levels" tab in windows control panel to 97-98% down from 100% (it's like an additional volume slider of some sort but doesn't work quite like it) which do affect how the soundstage is processed (less in-your-face, more widespread and deeper) and this lead to even more natural and better soundstaging when using 5.1 speakers. With the Creative card there's no such volume slider so I don't get to adjust the soundstage in a similar way. The Creative card remains therefore a bit worse soundstage wise. I hate this....
Went from ASRock Extreme6 to ASUS Z87 ROG Maximus VI Gene only because the ASRock onboard chip had very noticeable EMI noise bleed. Well the ASUS Gene motherboard then again has NO EMI noise issues whatsoever but the config doesn't sound as good as the Extreme6 sound quality wise (too bassy, lack of mids and highs, muffled sounding). The Extreme6 does sound actually suprisingly close to ZxR sound quality wise (and balance-wise, very slightly less bass but mids and highs are suprisingly great) if using the amped front panel jack output (rear panel is definitely much worse sounding) but the EMI is a bit much on that board. MAAAAAAAAAN, do I hate this stuff.... seems like it's meant to be that I won't be able to find that ideal sound of mine.
X_x