Well, after much deliberation and after asking for more advice from fellow members, I decided to get a ZR4. For me, I liked the idea of having one complete system (STi Driver and ZR4 integration), and being able to have the heads "receive only". Some might feel that it's a gimmick, which could possibly be true. For me, the thought of possibly not detecting LIDAR while driving in Ontario or Quebec with my STi up high was something that weighed heavily for me. Based upon what MEM-TEK has done with his modded ZR4, I look forward to great performance!!!