I found the process to be simple and painless. Bought a GRE PSR-600, used NF2G's excellent frequency table (which includes the digital codes)... and was back on immediately. It will also search out and display the P25 information if it is unknown to the user, a very nice feature.
The PSR-600 also handles trunking, analog with or without PL/DPL (so you can still listen to EMS & Fire), AM for aircraft -- and, best of all, is PC compatible. Just did my first firmware update (easy)... and bought ARC500 software (inexpensive), which makes fast work of programming. ARC500 even facilitates importing frequency data from this site. GRE includes the special USB programming cable with the radio.
Switching over requires no technical knowledge. Now MC Sheriff (+ NY State Police units with access) and RPD are loud and clear, with significantly improved audio. The digital radio system is as legible as a phone conversation.
I posted a sample of the digital audio here:
GRE PSR-600 PRS600 Digital Scanner – P25 Audio on Flickr - Photo Sharing!
The sample is mixed with a analog transmission (Pittsford School District's UHF Transportation repeater), and then reverts back to P25.