yes, I have used both Hagons and Ikons (and a hell of a lot of other crap as well), and Hagons ARE an astronomical improvement over stock. Thing is, the Ikons are an astronomical improvement over Hagons, and cost a couple hundred more than the Hagons as well. So basically, like most everything in life, you get what you pay for.
I encourage everyone to spend the money on suspension, as it makes for a very fun to ride bike.