My (used) front end I bought has Superiors and CTM's, however Superior doesn't make 35 spline 9" axles anymore. I wanted 4340, heat treated, and preferably rolled splines.
Currie cuts theirs from blanks, no warranty other than a discount on a new one if you break one; the rep. didn't know about heat treating
Mosers, Alloy USA, etc were too long to get a large enough order together and/or shipped up to my retailer here.
Yukons were available locally and quickly, and (rear shafts) have a 5 year replacement warranty. I recall them advertised as 4340, heat treated and cold rolled, mine look cut but I'm no expert: my metallurgical trained brother says most cut fine splines will still be well within the hardened depth. I'll take some close ups.
Mine came with new bearings with integral seal and plated retaining plates.
Drew, did you press the bearings on or were they delivered on the axles?