I'm with amckimmey -- give this one a shot first. It might only need to be cleaned & repacked.

If it has bearings in clips, consider using loose balls for the repack. Loose balls will contact different points than clipped, so that switch alone might help you avoid any old pitting (unless it's severe).

Be sure to use a front fender or "headseal" (Lizard Skin has one that's easy to find) to keep that lower race clean.

If you must replace, consider an old MTB headset. Maybe heavier, but more durable.

-Peter