You just have to decide what your goals are with the rig. I had so much fun when i first got my stock runner. Thats why i built it because i got hooked. I kepted upgrading because i wanted to go further and to harder places and i wanted a badass rig. I had a lot of fun on toyota axles and i thought my rig wheeled really well for what it was. I just personally couldnt keep toyota diffs together. I got tired of swapping third members out so i went the one ton route. After i got a new daily driver though it seemed my toyota thirds lasted a lot longer though because i wasnt driving it near as much.
I think it just all comes down to how you drive and your luck. Lol. Thomas on here has 42" iroks on toyota axles and i think he has only broken one ring and pinnion, but thats just his wheeler so it doesnt see much road time. I also know plenty of people on 39.5"s on toy axles and they dont have problems like i ever did. If i didn't blow out so many diffs i would have never went to one tons.
Thanks for the info/opinion.. I was reading through your build thread did you ever get it finished with the Tons?? If so how much have you wheeled it?