NAD has added an advanced Sigma Designs VXP image processor to its two preamp processors, the M15 HD (at $4499, a major update from the previous M15 Masters' Series), the T175 HD Preamp-Tuner-Processor ($2999), and the T785 flagship AV receiver ($3999f-shown). In addition, these products will now fully decode Dolby TrueHD and DTS HD Master Audio from bitstream.