It all depends on how you intend to use your ZX2 and what gear you own. If balanced output and native DSD support are must-haves for you, then I would totally splash out another $300 on a WM1A. Also, if you live in Europe you can easily remove the volume cap of a WM1A. This might be of interest to you if you have fully-sized headphones that are hard to drive. The European ZX2, unfortunately, seems to be uncrackable in this regard. Yet Sony's proprietary operating system, which the WM1A uses, doesn't allow for third-party streaming apps such as Spotify and the like. Like I said, it all depends on how you want to use your ZX2.