Handhelds are really worthless on Powell except for boat-to-boat or close to the marinas. You really need a 25W under dash and at least a 4' ant to get any kind of range. I used a ratchet mount on my last few boats that bolted to the grab rails and folded for storage. Mounted the unit under the dash.
Digital Ant is best IMHO. I had this one....http://www.marine-electronics-unlimi...%2DVW+VHF.html
Used this mount...http://www.marine-electronics-unlimi...ail+Mount.html
Pick your radio, any decent 25W under mount should work fine.
I have had great luck with this set up and it does not require cutting up the boat.