I got the same spiel from my mech back in Chicago. I asked him if I should do a repack and he said there wasn't much play in my front end, and that I should wait and do it with my brakes. So that is what I did. I did brakes, rotors and wheel bearings at about 45k. I think the repack was only about $300 for me to have the tire shop do it for me.
To stay on the safe side, I would get it done regardles...
Bart