I really cannot decide between the Zx and the ZxR....the price difference here is $130, I won't be using the daughter board. Play games and love listening to music (currently have a Essence STX and Denon 2K's).....it seems the price difference is due to the daughter board? Is the DAC on the ZxR that much better then the Zx? I'm willing to spend the extra but if its not worth it....then no thanks.
I suggest to move to a DAC device rather than purchasing the ZxR board. You can use DAC device with USB input (and other input sources) with multiple sources in your life (laptop, desktop, DAP...) while you have to limit the use of ZxR in your desktop with PCI-E slot. And I bet that the sound quality of Creative ZxR is much better than a DAC at this price range. In my opinion, unless you Creative-addict, shouldn't spend too much for Creative (losing reputation from years to years). I used their products since 1996 with a set of Soundblaster 16bit and am using SB Z now, but really disappointed at what they did to their famous Soundblater brand name through years.