I thought the real reason you sold both was that you found the kX Surrounder plugin on your Audigy2 with kX drivers to offer all the positional benefits without the hit to sound quality...but then you started having issues with that card, so you went back to Realtek.
kX Audio driver's surrounder plugin wasn't quite as good as CMSS3D in terms of positioning but I'd say it fit right between DH & CMSS3D and yea it didn't have any impact on sound quality whatsoever though. However I've moved on from the Audigy 2 ZS due to how I've noticed that the Realtek HD onboard chip has even better sound quality these days (probably due to the poor hardware 48kHz resampling on an Audigy 2 ZS). The Audigy 2 ZS card didn't have proper support in Windows 7 with those drivers, for example lacking speaker config... so had to rely on that plugin to get good positional sound. The difference between using 5.1 speakers in windows vs surrounder plugin is so small that I didn't see any point sticking to the Audigy 2 ZS card anymore even if I highly miss its VERY nice EQ.
Edited by RPGWiZaRD - 1/27/12 at 4:45pm