That was my original plan I was going to weld the rear and save up until I found my elocker. However I am getting the quick lock for free and the truetrac for just under a hundred bucks so I dont think I can really go wrong. Unless someone has seen some good deals on an elocker.
You can't beat those prices, being in Utah and having to deal with some snow and ice patches on the road a locker would be entertaining, the limited in the rear will serve you well in those conditions. Just remember that if you loose traction a quick tap on the brakes will make that limited slip kick in.