I am going to buy another Uniden SDS-200 scanner in the near future. I live 20 miles north of Peoria, IL. My question is: do I really need to buy all of the upgrades. (DMR, NXDN, ProVoice). I have to have DMR, but what about the rest? Most of the rail traffic can be heard without "NXDN. What about the ProVoice, what departments are using that, in the area? Thank you for your time. Appreciate your input. 73rds your way.