Why the Cynergy? I work at a gun club (trap and sporting clays only), and I can tell you why I've noticed more and more of our shooters using Browning Cynergy's vs Citori's for Sporting Clays -- the XT and Citori guns are longer barreled and were made specifically for trap and skeet shooting. There is also more of a heavier front end on them, which allows more of a follow through and less of a stop when swinging through a target. This is also why if you've noticed the fore-stock on the gun appearing more wide on the front. More wood, normally means a little more weight added.
The Cynergy is more balanced in weight, like a Beretta Silver Pigeon (higher up in price, but an excellent clays and hunting gun) and therefore an excellent sporting clays gun but not a really good choice for trap shooting. Sporting clays guns also tend to have a better swing and stop when it comes to sporting clays where you might encounter obstacles such as bushes and trees... or like in hunting situations (like what Sporting Clays was intended for) where you might need to suddenly stop in your window of opportunity.
I would use a Beretta Silver Pigeon (any number), SKB Sporting, Browning Cyngery/Sporting/or even the Sporting Clays edition... I would even go to using a Remington Upland Premier series that you could find at a Gander Mountain.
However, what I would do, is find a place to shoot at a few targets with someone's Cynergy or whichever gun you are looking at purchasing. Get a feel for the gun before you buy it, as I have heard that many people don't like the Cynergy because it kicks too much. I've also heard that SKB Sporting is too light... it's all on personal preference. I shoot my 20ga Remington Baikal for hunting, sporting, and trap and I don't have any issues against it (yet). Some sporting clays guns are "iffy" when it comes to buying them. You wont know what you like until you shoot one. Adjustable combs are nice on clays guns and trap guns, especially if you need to put on an AirTec stock or PFS to minimize the recoil.