Ditto what Barry said on good features. We installed a uniden um525bk as our main unit at the marina here with all the same features BUT instead of a RAM mike, it provides for up to 4 wireless mics which eliminates wiring in the cockpit and allows transmission AND reception anywhere on the boat.
I will second cam on that one. This is the same VHF I installed and now I have a remote unit in the cockpit without any wiring (except power wires for the charger base, I prefer to keep the remote charging in the cockpit, since even on the full charge it only lasts me about 5-6 hours instead of a full day). Plus I carry a handheld as a backup.