First off, how the fuck did you score Dukes for $150. Secondly, that's awesome.
As for skis, going on what was said above, the Dukes aren't that light, and if you want to be dropping cliffs, your options are fairly wide open. You probably don't want skis with a lot of metal in them, just to keep the weight down a little. ANTs would be a good choice, fairly stiff, fairly fat, and quite light as well. Also depends on if you like softer or stiffer skis, and how much you want to spend. Moment Rubys would be sick, they are light, but a little on the soft side maybe, Rossi steezes/ravens may be too expensive. Also the fatter you go, the more expensive the skins are going to be. Gotamas are always a solid choice, but maybe a little on the heavy side? Depends on how much you care about weight. Your options are wide open, and I'm jealous of your situation.