you won't need anything more powerful than a UV5r, unless you get a mobile or base. The UV5r is listed as 5 watt, but actually puts out more like 2.5 to 3 watts. Is about as much as you want for an HT. as far as effective communication, Height of antenna, quality feedline and connectors is far more important than watts of output. a 50 watt mobile is only more effective than a 5 watt HT, due to the ground plane of your automobile, 5 watt's will be nearly as effective with the same antenna and ground plane. by using High Power, when not applicable you only create a local RF mess, unless you have/find a high unobstructed location or a tower. (WQCN756) could be a repeater on a nice high tower for DX range like that.