I'm thinking of changing my current antenna for my SDS100. I currently use the Remtronix REM-800B for everyday use, monitoring primarily a 700 mHz Simulcast system. I've recently programmed a couple of 400 mHz DMR tunked systems, and am looking for a little better performance. Does anyone have any experience comparing the REM-800B to the REM-920B? Is there any improvement in the 400 mHz range with the 920, or even the 810S/820S vs 920S?