Personally I feel the Pros are worth the extra cha-ching-

I've just never encountered a dozen XTs that didn't have a few (3-5 or so) seriously wobbly arrows even after cutting from both ends, a few with slight wobble, and a few that are pretty straight. Def would never put a fixed head on those wobbly ones. IME, The Pros have always yielded a good 10-11 super straight ones and one or two with a SLIGHT wobble after end cutting.

Pros also are tighter in weight spec.