Certainly! For your Edwards | EST GL1RN-HDVMC replacement, both options can work depending on your specific requirements. If you’re looking for a direct replacement without changing the wiring, the EG1AVRN would be the ideal choice. However, if you need additional features like synchronization with other devices, the G1AVRN + GRSW-10 combination provides more flexibility. Consider your system needs before making a decision.