The question remains though... What agencies are these?
They maybe digital, but are they APCO25 digital? This is the only kind of digital that scanners will receive. If the agency is using MA/COMM or EJ Johnson or even some of the other types of digital like motorola's iDEN then you're not going to be hearing them. It really would help us help you, if you told us what agency, county/city you're interested in.
Just providing the frequency and the Digital PrivateLine info isn't going to help when it involves a digital signal versus an analog signal.
If they were all just analog, you could get by with the cheapest scanner on the market and it would work for you, HOWEVER if they're digital (AND it must be APCO25 (P25)) digital, then you'll need either a Radio Shack PRO-96 or 2096, or the Uniden BCD-396, or 996, or a BC-796D in order to hear them, and only if the digital is APCO25.
Can't answer that for you until you tell us who you're talking about.