Boomkicker provides boom lift but no vanging action.... rigid vang does both. So when pricing factor in all the necessary parts (though you can reuse an existing tackle vang with a boomkicker)
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)