I know many people swear by the Cane Creek Thudbuster, but I had one and didn't think it did much. I did make sure I was using the proper insert for my weight.
I now have a Kinect 2.1. I love that thing - I will never buy another suspension bike. They are pricey, but I ride every day and comfort is important. Selle Anatomica sometimes has them on sale for 25% off, which helps a lot.
I have seen a few reviews saying the Kinect is the best available. Although one review preferred the Thudbuster, and one slightly preferred...dang, I forgot. Something else.