I'd suggest you ride the stock saddle for a few months before you give up on it. Everyone's butt hurts when they begin riding. Experienced riders will often have a sore butt when they first return after an extended layoff. Those wide "comfy" looking saddles have their own issues, primarily chaffing of inner thighs. Keep in mind that while you may have a 3XL sized butt, your sit bones are the same width apart as a normal person. That's a nice bike, hope you enjoy it.
