This is one of the great things about a forum. You get plenty of oppinions! And most of them are valid.
I ran a front shaft in the rear on my 5K lb XJ for numerouse years. I never had any issues with either front or rear shafts, but I didn't use the skinny pedal as much as others might.
IF money grew on a tree in my backyard I would have had a TW shaft. IF I would have damaged one more than once or twice I would have bought a TW shaft. But for my purposes it worked flawlessly and was in expensive. I know many others who have had the same experience.
Also, I would rather use a DS as a fuse than a rear axle shaft, pinion, or ring gear.
Michael