Yeah at $75 each side for the fronts with a limited lifetime warranty, I just change them if they are in the 100K zone.
Duralast Gold CV Axle 10510N - Read Reviews on Duralast Gold #10510N
When my passenger side outer boot began to bleed grease at ~103K miles, I tore down the whole front end to replace all the ball joints, bushings, arms and CV axles. Now I can look forward to trouble free front end components for quite a few miles.
Mike