Here's my lightly modded Rancher...
If you're doing mostly trail stuff, you won't miss the front differential. Except for deep mud, I rode everywhere my buds' did on their 4x4's. My only problem was the front end getting light on rough, steep climbs. If you add the winch (I did after sticking mine in a mudhole) and bumper from your list, that'll help with some weight on the front end.
I'd say add some good tires and a winch, and you'd be good to go.

If you're doing mostly trail stuff, you won't miss the front differential. Except for deep mud, I rode everywhere my buds' did on their 4x4's. My only problem was the front end getting light on rough, steep climbs. If you add the winch (I did after sticking mine in a mudhole) and bumper from your list, that'll help with some weight on the front end.
I'd say add some good tires and a winch, and you'd be good to go.