IMO, the yokes/u bolts/etc. are a bad idea. Too much crap moving in there. The D60 knuckles also have to be machined, taking strength out of them, to have enough clearance for the yokes. This would mean even more specialized parts that are hard to find.
Yukon makes some nice 4340 alloy shafts that are way more simple that the Sunray setup, and with CTM's, approxiamately the same price; arguably strength. Plus you get the benefit of not running a custom machined knuckle. As everyone already knows, Superior and CTM also make upgrades from the Yukon shafts that are even stronger, but more money. So far, I have seen very few people even break the Yukons, much less any other offerings of high strength D60 shafts. I have heard of several cases of the Sunray D60's breaking though, for one reason or another.