MarkM98,
IF you fish around long enough I'd say Deaver is the clear winner. HOWEVER, I do NOT have personal experience with Icon. My recommendation is based off my personal research, personal needs, personal experience with ONE product, and customer feed back. Deaver has been around a LONG time. They can and will make you anything you want to meet your custom needs. Problem is like many OLD companies, you have to pick up a phone. Don't expect good "electronic" customer service. The Icons may be cheaper, and "adjustable", but having been around manufacturing a minute, the Deavers just look solidly engineered and durable.
As I said though. One persons opinion based on that persons needs. Don't think you are going to have someone here feed you some magic pixie dust and guess what will make YOU happy. You might find the Icons a better fit for your needs. Problem most customers have is being honest with THEMSELVES. Most WILL NOT "adjust" the leaf springs. It's usually a get it and forget it ordeal. Just remember, everthing is a trade off. You give up one thing to get another. Load versus a little ride "quality" in my case.