Re: 686E vs Cynergy
Both seen to fit and feel about the same for me.
The Cynergy is a little heavier and has different stock dimensions than the 686E, so if you spend a little time with each you should be able to perceive a difference. Some people prefer the Browning measurements and others feel more at home with the Beretta dimensions, so take your time, get thoroughly acquainted with each, and pick the one you feel most comfortable with.
Both are available with an adjustable comb, which I view as a distinct advantage - try and find one of the adjustable models. However, the Cynergy adjustable stock adds about 12 ounces to the weight of the gun, while the Beretta system adds only a couple of ounces.
The Cynergy comes with ported barrels, which I find annoying (noisy) but others like.
The 686 has 3 inch chambers while the Cynergy Classic Sporting has 2 3/4 inch. Not at all important for shooting clays, but if the gun has to do double duty on a duck or goose hunt then the option is there.
As for resale value, I don't know much about price, but I do believe that the more familiar, more proven design of the Beretta is easier to sell. It's not that the Browning is worse, but it is a very different and newer design. By and large, gun buyers are a conservative lot (no political double entendre intended).
There are many other significant differences between the two guns, from the firing pin system to the bore diameters, but ultimately you can expect either to be quality, long lasting product. The devil is in the details, though. Take your time, examine each gun carefully, ask lots of questions and trust your gut feelings.
Sharptail