". . .Anyone with experience, what is the best rain pant?. . ."

Like many things, this is a matter of preference, riding distance, temperatures, riding pace, budget, etc. . .

I have some Craft rain pants that are excellent, but perhaps not in warm rains. . they are superb in cold rain (like steady rain with temps in the 30's or 40's. When it's warm, I just get wet (too bad sox are excellent wicks!)

completely waterproof pants won't breathe and you'll sweat profusely inside them. Well designed and constructed breathable, cycling specific pants (like with articulated knees and adjustable cuffs) aren't cheap. There are always tradeoffs. . . .