You don't say where you are or which counties you wish to monitor. Assuming the RR database is correct and up to date the Viper system is a Phase 1. I did a veryquick scan of the talk groups in the database and found the overwhelming majority of them are in the clear. I saw only a few encrypted talk groups. Of course, all of that can change and I did not look at every agency. The Viper management could migrate to Phase 2 and/or start encrypting more talk-groups at any time, You surely realize that if you buy a scanner that is a Phase 1 only and the system changes to Phase 2 and/or if more talk-groups go encrypted that Phase 1 radio will become a brick. If encryption goes system wide your SDS radio will be a brick as fas as listening to the Viper system. It will still be good for monitoring maritime users.
But...your SDS radio can monitor both Phase 1 and Phase 2 talk groups. It is considered by many to be the top of the line. Why do you feel the need for a cheaper radio? Are you having issues with the SDS?
I strongly urge you to click the REPORT button in the lower left corner of this message and ask the moderator to move this thread to the North Carolina forum where you can get more specific information about the Viper system, their current configuration and plans for the future. Since your SDS can fulfill your current needs (Viper and maritime) I would NOT buy another radio until you have a clearer picture of where the Viper system is now and its future.
Good scanning.