This really depends on what you want two-way radios for, where you will use them, and what budget you have.
In brief, if you need something for open air with no obstacles and decent range then go for a VHF Licensed radio. If you need something in a built-up area but only need 1/2 mile range then a license free (PMR446) radio will be fine. If you need a longer distance than this, then you’ll need a UHF Licensed radio. There is also the option of a network radio that uses cellular data rather than radio waves, so you’ll essentially get nationwide coverage.