That bike was never intended to have front suspension,so adding a sprung fork will mess with your geometry. You may not like the way it handles after the mod.

Not a fan of suspension personally. Lots of weight,sucks up power when climbing,and you get fork dive when braking. We've been building some fat bikes at the shop lately;I'd go with a bike with fat tires over suspension. Built a Med Surly Krampus Ops that weighed 30lbs 1oz with pedals,that's the same as my Safari. Pretty good for a monster like that.