Ok, so now we heard from someone who decided to throw his money away.
Everything I've read about the OEM locking hubs are that they are just as good (if not better) than Warn or any other aftermarket. If you need to buy new, ok go ahead and buy Warn or whatever. But the wreckers are full of stock hub locks on trucks (basically because they NEVER break, so no one needs the parts). Before spending the $200+ on Warn, I suggest you look at the local wrecker..... I've never had problems with my stock equipment, other than to open and inspect (ok, I was nosey) once.
Just my opinion,
D'mon