If you want tri wheels, get tri wheels, don't think about throwing them on your road bike.
If you really want something that will work for both, the Zipp 606 is the way to go (404 front, 808 rear). Check out the Testrider review if you are uncomfortable with putting them on a road bike, you should change your mind.
As far as disks go, get one if you are not planning on Kona, Alcatraz, or anything with a lot of winds. Zipp 1080 has better aerodynamics than most disks anyways.
For Hed, i would go trispoke h3 front h3d rear if you are not getting a disk.