A touch confused

Gonna grab a radio for all around use. My biggest concerns are range and broad spectrum of useable frequencies. I work for a security firm and I’d like to not need to worry about being able to tune in the frequency at each location.

I looked at a comparison chart and it looks like the UV-25 , UV-5RM+, UV-K5+ offer the broadest range of frequencies and the most power. Are there any major advantages or disadvantages between these? All the models and features can be a bit overwhelming.