At the present time, the police systems in Ocean County that are digital are Dover Twp., Lakewood, Little Egg Harbor Twp., and Point Pleasant Beach. I believe Berkeley Twp. is in the process of converting to digital. All of these systems have encryption capabilities and no scanner can receive encrypted transmissions. If you aren't interested in moniotoring any of those systems, then you don't need a digital scanner.
Ocean County operates on an analog (not digital) 500 MHz Motorola Trunk System, so if you want to monitor them, you would need a scanner capable of trunk tracking. They also use some UHF, VHF, and low band frequencies that aren't part of the trunk system. However, for the most part, the bulk of the operation is on the trunk system IE: dispatch for some police departments, the Sheriff's Department, Prosecutors Office, fire ground operations for some of the fire departments, and county services. As for them going to digital, there's no information at the present time to confirm yes or no, but the possibility always exists.
As for Lacey Twp., they use an analog (not digital) conventional system for police and EMS. The fire departments are dispatched by Ocean County and operate on the county trunk system.
With all of that in mind, it would be best for you to get a scanner capable of receiving trunk systems. I have only dealt with Uniden Scanners, although Radio Shack scanners are very popular also. Some non digital Uniden models that have trunk traciing capabilities and would serve your purpose are:
BASE MODELS - APPROXIMATE PRICE
BC898T (500 channels) - $220.00
BCT8 (250 channels) - $175.00
BCT15 (2500 channels) - $230.00
HAND HELD MODELS - APPROXIMATE PRICE
BR330T - (2500 channels) - $250.00*
BC246T - (2500 channels) - $200.00
* - I believe the 330T has a NASCAR decal on the front of it. It's got something to do with the scanner being able to receive the NASCAR frequencies and I think Uniden may have some kind of a deal with NASCAR to display the decal. Some of the other cheaper hand held models that don't trunk track also carry this decal. This turns a lot of people off.
I've always had Uniden scanners and find them to be excellent. Others may recommend Radio Shack models. I guess it's just a matter of what people like and are happy with.