I have a NAD 753 that has power issues (shuts down) driving Phase tech PC500s in the surround mode (that mode adds two phase tech teatro 4.5s and two surrounds along with the center and subwoofer channels). Can I solve this problem by getting a NAD amp and hooking the PC500s only to it while using the 753 to power the rest? The 753 works great in stereo mode with the PC500s. Any better ideas out there?