Since we are on topic with the Soundblaster Z series here, I thought I'd have something to share:
Apparently, the newest batches of the Z is different from the batch that was on initial release back in Nov 2012. The difference being that the latest batch of Z is using a mixture G-Luxon and Fujicon caps.
Originally, it used Nichicon Gold caps.
The Zx on the other hand while on paper is pretty much the same thing with the Z except for the ACM module, does use Nichicon Gold caps until today.
Just thought I'd give a heads-up.