Suspension Travel....How much is Enough

[Tincup]

I'm setting up my rear suspension, and was wondering what everyone is is using for suspension travel. I know on my Dart it's not much, maybe 2" and the car seldom bottoms out. So on my truck I was thinking on going with 2" between the axle and the bump stop ( I have coilovers, so raising it is not an issue ) with that being said, I would still like to keep the truck as low as possible. All comments welcome..