Clevefails,
Well, I have been shooting GOEX for 40+ years and have never had a reason to change.
I did try Swiss at one point several years ago, and although it was fine powder, and I got a bit more consistent readings on the chronograph, and it might have been a tad hotter and cleaner, I didn't see enough improvement over GOEX to warrant going for it.
It's kinda like the old car thing, one person likes Fords and another likes Chevys. And once in a while you find someone who prefers American Motors. They are all good.
Same with powder. They are all good. Some like GOEX, some like Swiss, and some like KIK and other like whatever. The only thing is, if you do switch powders, then be sure to double check how your rifle is shooting, else you might get a surprise with where it hits.
And that is the fun of it all. If you are not enjoying it, you are doing it wrong.
John