My opinion varies a bit. its not all about the terain your on, its how you drive your jeep on that terrain. case in point, checkout the socal chapter forum and read up on Johnson valley thread. 2 XJ's were buggied out, 1 was fullsize axles, and 2 were fairly stock. I have a D44 rear with superior shafts and a detroit locker, D30 front with no-slip, Yukon CrMo inners and stock TJ outers with 760's. I am on 33" BFG AT's. The black jeep has 33"s, 8.25 rear and D30LP front. he has no-slips front and rear.
not a broken shaft, or anything. those of you who know Jackhammer can apreciate what that means. Ron did a great job of getting his Jeep through. He was new to a trail of that high of difficulty and he had to watch two Buggy type XJ's ahead of him. he had no winch and didn't need a strap.
D30's and 8.25's are great with 33"s. why go D60's over D44's... weight. when you can build a D44 to be lighter and stronger than a 35 spline D60 and get better ground clearance too!
just my .02