Actually they, along with Camden County are indeed migrating to a countywide 700MHz. trunked system platform which will eventually be combined into the NJ Statewide systems to allow roaming throughout the state. Most users who are abandoning UHF T-Band in NJ will be following this migration path under authority of the Attorney General for the State of New Jersey; otherwise they will loose funding from the state for such projects. This also applies for Federal funding as well. Most agencies across the country are being forced into consolidated systems such as this. It's not necessarily a bad thing either as many in New Jersey are trying to make it out to be. They are just scared they are loosing the strong holds on their little fiefdoms they've controlled for years.
700MHz. is the new "cats meow" on the block, just like 800MHz. was in it's day, and VHF-Hi Band in it's heyday...
Rest assured, the new 700MHz. systems will be some flavor of Project-25 Phase-II, most likely TDMA-X2 in New Jersey. Even Atlantic County, historically M/A-COM EDACS based is migrating to Project-25 in the near future.
Status quo is no more in New Jersey; like it or not, the 21st century is finally upon you!
Coming soon to a county near you; Countywide Police, Fire, EMS, and Public Works services... Just wait, it's coming too...