For no more often than you change that stuff, it's good to pick a great product, but I'd go with the cheaper stuff too. The axle joints live in a somewhat protected enviroment and as long as there's some kind of lube in there the will live well. Far better chances of breaking one than ever having one wear out.
Of course, submerge them in water repeatedly, and forget to clean them out and all that changes. I found the ugliest looking wheel bearing at FE 08 for that reason
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