Broaching out factory spicer hubs works pretty well, evidently they're pretty tough, and looking at the guts, they have the meat to get it done. I've broken ujoints with the warn hubs but I know they're not super beefy. Point is that they don't just fall apart on the trail, you do get some use out of them. With superior shafts, I don't know what to do for a hub, the only thing that would come close is a modified spicer. Maybe you just pull the gears for long trips? That could be a big pain but it's better than expensive hub fuses.
I actually prefer the warn drive gears, I like the separate plate retention method better than bolting the cap to the gear. I think the warns would be a little easier to set up with the right spacers to keep the spindle seals pulled in tight.