Unless you want to kick things in the face with lasers, then get melee. --- It's a man's life in the British Dental Association! http://www.washingtonpost.com/wp-srv/world/iraq/casualties/facesofthefallen.htm
Pick whichever you like. You can switch between them in the intermission from your second playthrough and later. I think the blue one has a better map attack and I like having another sniper, so I stick with that. Used red a few times and was just..."Eh."