O-dog,
The pole will work well as a whisker pole. If you have the topping lift for the pole even better. You can really lock the jib winged out at large angles with it on the pole.
If you have a spinnaker, you will probably try it and like it for long downwind legs in light wind. It's not too big on the E29 to be hard to manage. If you have a place to store it on deck (or out of the way at home) having all the spin gear should help resale down the road.
Mark