"I looked at a 4" 686+ today, those are nice. I like the red ramp sight as opposed to the GP's black ramp. The grips are kinda like a Hogue."
Red ramp sight: Nice, but not all that big of a deal to me. At least at the indoor range where I shoot, the lighting is such that I really can't see the red anyway -- it is backlit. Outdoors, where you have better lighting? Nice.
Grips: I bought mine used, it is a much older model (early '80's, no dash) that has the stock square butt checkered wood grips. They feel fine, look really good, and I see no reason to change them.
"Any difference in the 686+ besides holding a 7th round? The trigger on this one wasn't too good. Seems like new Smiths used to have better triggers. The GP is about $100 less than the 686."
Not that I'm aware of, the 7th round is the difference. Some people have questioned the lockwork on the 7 shot models, but I haven't heard of any actually giving problems.
Trigger: Well, let's just say that is one reason I got an older used one as opposed to a new one. The trigger on mine is just plain wonderful. And I didn't pay anywhere near NIB retail price, either. Significantly less even than a new GP-100.