If what you want is something better than the typical box store walkie talkie programmed for GMRS or FRS channels there are a couple of options.
Pick up a pair of Baofeng UV 5R 5W programmable units and a programming cable (ebay, amazon) and go to the chirp website to customize the radio. Many ham radio operators use these radios on ham channels as portable units,
Then program the radios to use digital keying so you won't need squelch and program them for GMRS and FRS channels along with the 5 MURS channels.
For a few more bucks you can get the rugged radios version of the same units that are much more robust, but more expensive. Rugged radios periodically puts their units on sale. Again, you'll need a programming cable and chirp website to program them.
We've used baofeng and rugged radio units for year with good luck. Available as accessories for both are larger battery packs, along with a plug in car charger unit and longer whip antennas.