I too have used original ball bearings for years, can't remember the last time I had to change them, even with larger than stock tires that should cause greater bearing stress, never a hint of accelerated wear. I probably installed new ball bearings before the Alaska drive, around 1999 maybe, which is at least 30-40K miles ago. Ball bearings are still good to go!!
HOWEVER, I'd go with roller bearings if I had to change tomorrow, unless it was crazy expensive. Then I'd enjoy my balls and drive happy.
