My vote - same price as the 686SSR - was the 627 Pro. I don't compete, other than to embarrass myself on the Steel Plate Challenge. Locally, round count doesn't matter - 5, 6, 7, 8 even a 10 shot 617 are fine. Two major classes - revolver or semi-auto - now separated to cf/rf, too. As the quintessential plinker, the 4" 627 Pro was/is ideal. Decent trigger, moonclip-ready, spring-loaded front sight, eased charge holes, etc.
I bought my 627 Pro 5/08 - added the HiViz sight, a .25" Classic/DX style spring held, immediately. My favorite grip was an Ahrends retro target non-fg in cocobolo - until I took a chance and ordered another JM-style, a la my 625JM - great fast grab. I didn't like the gritty sides of the 686SSR - and love the extra two rounds. Of course, I don't compete - so the round count didn't have to stop at 6. YMMV.
Stainz