An older 66
This is my first post, and this seemed like a good place for it.
I can't speak to a comparison of the guns because I not familiar with the 608 or the 627. I have a 66 with a 6 inch barrel. It's ten years old, with wood grips. I've had it for two months now, and I've very pleased with it. It's a fairly heavy piece and doesn't lend itself to ccw, but I only use it at the range. I'll typically fire 150 rounds each visit, and it's very comfortable to shoot. I shoot quickly, and the barrel will get quite hot, but it's heavy, and there's not much reduction in accuracy.
It's a very well made gun.