I had a Wintec Pro without contour blocks (adjustable gullet), and the balance was good on it. It was extremely comfortable, like a couch, but I decided to sell it because I could not feel the horse’s movements AT ALL. I’m from the old bare-bones saddle era, and I just couldn’t get used to it. The older pre-adjustable gullet wintecs are much less padded, and seem to fit a wide variety of horse shapes also. This is an older Pro: http://www.ebay.com/itm/17-Wintec-Pro-Dressge-Saddle-Regular-Width-Tree-/301641717304?hash=item463b3f5638:m:mygn3rHWCk6jNvxfd9cL6pQ .
Like some of the other posters, I’d also encourage you to try a Thorowgood. Incredible balance and extremely comfortable. The older models can be had for a song.