Anyone who has done this quest, what are your opinions on the two rewards? Which should I choose....

anyone

Do you use 2 handed weapons?

If the answer is no then go for the mask.

If the answer is Yes, do you use 2 handed axes? (if no go to mask)

If so, will you likely be leveling smithinga and enchanting (if yes, go for mask)

If not, then maybe you should get the axe.