I have a 6 inch GP100 with the full underlug and it is a great shooter but I must admit I like the looks and the balance of the short underlug better. (Not enough to trade at this point.) Seems to me, though, that the longer and heavier barrel, even without the full underlug, would be at least as comfortable to shoot as the four inch full lug gun.
Question is, is it as easy to shoot as the six inch full lug? Sooner or later I'm gonna talk myself into another gun.