I put mine on the outside, because I do not have a press, and am too cheap to have the shop keep pressing the bearings on and off. I've had no problems with mine. If you have a press, I'd put them on the inside, though.
Do you have a case spreader? Will be way easier if you just have a shop put them in. But not too hard to do yourself. Setting up my gears is the one thing so far that I never wanna do again.
Beauty is in the eye of the jeepowner.