I have been using GOLD TIP XT HUNTER arrows for 5 years now and they are a good choice.
I don't think I would try and find one arrow for moose and caribou.
Too big of a difference in size and average shot distance.
What ever you used for those dandy bucks should do for a caribou.
I would definately use a 125 gr cut on contact BH.
For the Moose I would just add weight tubes.
KISS is alway a good idea