well, first off, if you do not posess a wide angle lens then get one, there sick and you can use it for OH sOOO much. i would HIGHLY say the wide angle.
unless you shoot alot of wakeboarding and such like i do in the summer. i have a 70-300 and i pretymuch ONLY use it when im shooting wakeboarding..
on the other side of things, i have a gnar wide angle that i pretymuch use ALL THE TIME.