Regarding some of the earlier comments:
Audio on the patches to the existing system suck. But then, the existing system audio was never balanced properly, so what do you expect?
The early state implementation was using EFJohnson VM900 dual-band units. They're great radios--I deployed many, many of those radios and the Viking VP900 portables on an Atlas P25 VHF-700-800 trunking system which worked well with Kenwood, EF Johnson, Tait, BK, Harris, and Moto radios. It was a wonderful system without proprietary constraints. Too bad the local vendors lost out here, which may well impact other municipalities ability to participate, not to mention cash flow to the local vendors.