I'm about to order myself a 686 and I'm going through a similar dilemma. I want a set of target style grips, and Ahrends is one of the top companies that I am looking at. I'm not much of a finger grove fan myself, as so far I have removed all of the finger grove grips from my guns and replaced them with non-finger grove options.
I'm looking really hard at the Retro Targets myself, I'm just a little worried because I have no way of feeling a set to see if I will really like them. I handled a S&W 329 with the tactical finger grove grips today, and they weren't that bad, but I prefer target style grips more myself. I like the original wood grips that used to come on the 686's, but they don't make those any more and the new guns are round butts.