I think most any of them will work OK. You can get some pretty ritzy ones these days.
I've got a Realistic (Radio Shack) WeatherAlert that looks like an old pocket transistor radio with a pull-out extendable antenna. Three crystal channels that you can switch between. It has a stand-by mode where you can leave it on, but you won't hear the radio; but if the NWS sends out an alert, it will start beeping at you. Runs on a standard 9 volt battery or plug in wall-wart.
It's 36 yrs old and still going strong!
1988 Coleman Sequoia - popup (1987-2007)
2012 Roo19 - hybid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10