I don't have a Unication myself, although if I had the money for one I'd look more closely at it. I'm not sure if you can hold on a TG, or selectively limit the number of TG's to monitor at any one time, but that is something I would want to be able to do myself.
For the RWC:
Simulcast A is in Phoenix.
Simulcast B is in Phoenix.
Simulcast G covers the West Valley cities, except Buckeye.
Simulcast J is in Buckeye.
Phoenix PD is on Simulcast A.
Phoenix PD 200/800/900 are also carried on Simulcast G.
Phoenix PD 200 is also carried on the Thompson Peak IR site.
Glendale is on Simulcast G, and at least Glendale South is on Simulcast B.
Peoria PD is on Simulcast G, Simulcast B, and the White Tanks and Towers Mtn IR sites.
Phoenix Regional Fire K-decks are carried on Simulcast B, Simulcast G, Simulcast J (all of the Simulcasts except A), and at least K-1 and K-6 are carried at least part time on the Towers Mtn IR site. K-2 is carried on the White Tanks and Thompson Peak IR sites.
The current Maricopa County radio system is not simulcast, and reception should be straightforward, provided your scanners have been programmed properly. MCSO West (Dispatch, Car-Car, Emergency, Tac) are carried on the three main Maricopa County sites: White Tanks, Thompson Peak, and Central Courts. I don't know where in Phoenix you live, but unless you live in a bad reception area, you shouldn't have a problem receiving at least one of them.
Unless you can find a "sweet spot" to put your scanner in, or can install a directional antenna at home, reception of the simulcast systems are a pain. I've accepted that I cannot listen to everything that I want to hear, and content myself with what I can. I use the White Tanks and Towers Mtn sites for Peoria PD, and even that isn't 100% reliable for whatever reason(s). And it seems like they drop out at the most inopportune times.
I'm lucky to catch K-1 and K-6 on Towers Mtn, and I usually just listen to the VHF side, 154.190 for dispatch.
I've basically given up on Phoenix, Glendale and El Mirage PD's, as well as Tolleson, Avondale and Goodyear PD's and the Tohono O'odham police/security at the casino by Westgate. I can hear Surprise PD on the White Tanks IR site.
I use a GRE PSR-500 handheld scanner.
I also have an old PRO-2020 base scanner for Phoenix FD VHF and a few other channels. Additionally I have an old PRO-43 handheld that I basically only use on the occasional road trip around the state for DPS, when I use the PSR-500 for other agencies.
John
Peoria