I would urge you to find a dealer that will allow you to demo a Phoenix USB in your current system to see if it improves sound quality enough to justify the cost. In my system, the Phoenix improved the realism and naturalness of the music supplied by my Innuos Zen Mk3 and processed by my PS Audio Directstream DAC.
I liked that the Phoenix was designed to work perfectly with my Innuos server and included a clock, a high-quality power supply, and a USB regenerator in the same case rather than expecting me to cobble together several external boxes and power supplies. This is basically the same approach as Innuos took in designing the USB path for their top-of-the-line Statement server. The fact that you already own a Zenith server makes the Phoenix a logical upgrade path for your system. But you really should demo it first to make sure that the sonic improvements you hear are worth the cost.
I liked that the Phoenix was designed to work perfectly with my Innuos server and included a clock, a high-quality power supply, and a USB regenerator in the same case rather than expecting me to cobble together several external boxes and power supplies. This is basically the same approach as Innuos took in designing the USB path for their top-of-the-line Statement server. The fact that you already own a Zenith server makes the Phoenix a logical upgrade path for your system. But you really should demo it first to make sure that the sonic improvements you hear are worth the cost.