For those who want to learn more about the UERM and/or looking to purchase/demo them.. I highly suggest contacting UE Sales rep/Head-Fi member CEE TEE. He's extremely knowledgeable about UE and a guy who's as nice as they come.. I can't make any guarantees, but he may be able to offer the RM at a discount.
I can't echo this enough. CEE TEE is incredibly knowledgeable and not only was able to relate my tastes and his in order guide me to the right decision, he helped me through the entire process and made absolutely certain I was making the right product choice despite me being hell bent on getting the UERM from the start. I'd recommend anyone contact him if they're looking for customs.