Are you going to 33's?
1) Always a good idea
2) Extended brake lines, dropped rear panhard rod, extend swaybar links, you might need longer shocks - adjustable control arms would be nice to get the pinion angles right -
3) They stop your tyres from rubbing on your guards with too much flex.
But hey there is more than one way to do it, so ask around. I would say a 2'' body lift is the easier way out.
(actually don't listen to me - i have a habbit of spending more money than i have
)