I rode on the stock saddle (Prologo Kappa Dea) from my Synapse for several hundred miles but I just replaced it with a Specialized Ruby saddle around 2 weeks ago. My sit bones were slightly tender the first weekend I rode on it (55 miles over 2 days) but I just finished a 50 mile charity ride last weekend and I had no discomfort in my sit bones or tissues at all. My saddle is pretty level but I had to play with the seat height a few times since it is thinner than the stock saddle. Hopefully you'll find a seat that works for you soon!