The SDS series is pretty solid on 700/800 MHz P25 systems, especially where simulcasting is a factor. You should be fine for scanning the MRRS and probably also the Westchester system, but it also wouldn't hurt to purchase the scanner from a place that has 30 day no-hassle returns in case you aren't satisfied. And of course hold off on purchasing any DMR/NXDN keys until you know you'll be keeping it, as those are non-refundable and non-transferable keys...they are married to the scanner's serial #.