I anticipate purchasing a Uniden Bearcat BCD996P2 to monitor Polk Co (while I'm in western Jasper Co). And probably Westcom, as well as DMPD and of course ISP . I used to listen to Polk Co on a BCT15, but haven't been able to hear them since they went digital. While I was looking at the options for purchase on the Scanner Master website, it appears that I can buy a DMR Update & ProVoice Update for the BCD996P2 during the initial purchase (for $75 a piece). Do I need to get them (to listen now) and/or should I purchase them for future use in Iowa? I'm really not that familiar with what they are/what they'll do for me (aside from costing an additional $150.00). Thanks in advance for your suggestions!