I'd really like a 22lr with a 6 inch tapered pencil barrel, kind of like the Colt Officer's Model Target, or Match (I forget which one). I only fired one once, but I really like how the longer tapered barrels point. I also like how they increase the sight radius without adding as much mass to the end of the muzzle. I had a model 48, and a model 648, both with 6 inch barrels, and even though the muzzle jumped very little on either gun the model 48 came onto target easier and was quicker to acquire a new target with because there was less weight pushing the muzzle to overtravel.
By the way, beautiful 617, Revho. I am not a fan of the full underlug look. That 617 reminds me of my model 10 heavy barrel. Simply beautiful, and practical.