I have had two burbs with barn doors, 90 and 94, and a k5 with tailgate. I now have a 99 burb with tailgate. 99 is my favorite for visibility, table use, window pops up to keep the rain off when loading stuff. Tailgate is much lighter than the k5 since the window is not inside it. The visibility issue with the barn doors was the worst thing.
I am now on another burb. 2001 2500 4x4 8.1 and it has barndoors. I really don't like them at all. Visibility sucks.