I have a 17-5 (8 3/8") barrel, a 617-no dash (6") and a 617-1 (4"). They're all great guns and very, very accurate, both in single and in double action. My eyes aren't what they used to be and that limits my range somewhat. However, with any of them I can routinely get 1" double action groups at 10 yards and 2 - 2 1/2" groups at 15 yards. Things spread out a bit at 25 yards but that's me, not the guns. My favorite among the three may the 6-incher. They're all six shot models. I don't like cleaning all of those little chambers on a 10-shooter.
As far as limiting yourself to pre-lock, that's strictly a question of taste. Mine happen to be pre-lock models but I have nothing against lock equipped revolvers. As far as prices are concerned, I purchased all of these guns within the last 12 months. I purchased the 4" gun at a show for $500, the 6" on Gunbroker for $550, and the 8 3/8" gun at a gun dealer for $375. The last one was, in my opinion, one of those lucky breaks that don't come along too often.
I've fired a 63. I'm not real impressed with it. I don't know about accuracy but the J-Frame trigger is considerably heavier than the K- and L-frame triggers and that's an issue with me because I shoot mostly double action.