I'm sure it'll be a huge success in China. $400 (equivalent) for a phone that on paper outclasses the Galaxy S3 in basically every way? Only issue I'd have with it is its size; that thing is a monster no matter how you slice it (side-note: the S4 rumors are all pointing to a similarly-sized phone). We'll see how it does in the real world come December. Incidentally, on the exact day my Verizon contract expires.
I think our options for audio-oriented phones will explode once Google finally enables USB audio by default in Android. Until then, we're dependent on the phone maker. One thing I have heard nothing about is audio quality from Huawei/Oppo/Xiaomi phones. Meizu at least advertises theirs (makes sense, they've been successful with PMPs in the past).