I don't understand the reason for the 19X. It has no longer sight radius than a regular 19, which means a G17 or 34 is better for tight shots. The grip is longer. For this size gun, the length of the grip is the dimension that is most limiting for concealment.
I would by a 34 or 17 for a duty gun or for a carry condition that is easy to hide. If I had a harder hide situation, I'd go with a 19. I might carry a back up G17 magazine for more rounds, though the difference between 31 and 33 is pretty unimportant for a civilian use case.
If you like it and shoot it well, go for it. I have a bunch of guns that are just for fun. Given that Glocks are so defensive oriented, I don't know why they came out with it.