Since I have Bowhunted all EXCEPT Moose I would have to say Moose. I have seen many of all in the wild & it is a toss up between Moose & Elk.
PLUS-if you pick Moose, you may get a chance at a Caribou (depending on where you pick to hunt). I have a friend going for Moose AND Caribou in Newfounland this Sept.. Caribou are awesome also-I took a 50" Bull in Quebec a few years back. Good luck.
I cannot justify the cost of Mule Deer or Whitetail hunts but can the others.