The Hagons 2810 have rebound dampening that make them shine over Progressive 412 series, no question. I have been testing the Hagon Series as well and they are a great ride. Even their entry level shock is a good ride, but in my book the rebound dampening makes the difference. The company is great to work with.
I just completed a test on their Nitro and now going to test their front springs.
Nice thing about the 2810's you can get some variations in the body work, like full Stainless Steel Shrouds, or black..options are always nice.
eddy
