I agree with Utah; I drive my Jeep 600 miles between Panama City, Panama, and San José, Costa Rica 4 times a year, and still tackle all the fun stuff. I drove another '94 wrangler on 35's the other day, and that one was HORRIBLE to drive. It was simply not built for road. In my opinion, finding a balance between on and off road is the key (you have to sacrifice some off road ability if you want to maintain on road stability, but a good compromise is always available).
As for the locker, just be sure you find something strong enough to survive off road; the cheaper lockers tend to be cheaper for a reason. I love my ARB lockers, but others find them too complicated (if the lines break or the compressor fails, you are out of lockers). In my opinion, air lines are easy to fix (I always carry quick couplers with me), where as if you break the wires, it's a bit more complicated to fix on the trail; I did kill a compressor (ingested water) and had to run all the trail without lockers, but I now have connected the intake of the air compressor to the stock airbox (I have a snorkel), so hopefully, that is fixed. Automatic lockers tend not to be great onroad, but they do give you one less thing to worry about off road. In other words, you need to find what works for you and for your type of offroading and onroading...