All about your perspective. I've owned a bunch of CJs. On the trail a mildly modified 100 is not in the same category as a mildly modified CJ. But, the CJ is more like a street legal tractor. The Wrangler too - better off road, miserable compared to a 100 on the street. I just drove my mother's new Avalon. Holy *$&@ is that a nice, quite, smooth, solid, fast, good-handling car. It makes my 100 feel like a 15-year-old truck. But, I hear the Avalon's not too good off road.
There is no vehicle more reliable than a 100 series Land Cruiser. So, check that box. As far for "how good it is off road"... that one's more a balance of how much "nice" you want vs. how much "hardcore" you want. For the guys on this board, the 100 is the right balance.