I've just swapped from the Ezzy's to Simmer after 12 years on Ezzy. It's taken me two years to make the decision. I've really gone off the large ezzy's, for me there's too much locked in power. I've been finding it hard to progress my freestyle with this constant pull. For me the ezzy's work best when there well powered up. The Black tip is super smooth, accelerates real easy, stable at speed, goes super neutral when you transition and always feels light in the hands.
I was worried the 6.0 Black tip was going to be too big, 5.8 Ezzy was my largest sail but it feels much lighter and smaller than the ezzy (in feel not power). Currently I've only sailed it in mid to low power so I can't comment when it's real powered up but I like the way it works in the marginal conditions. My wife did comment it was harder to water start, probably because of the lack of pre-built shape although she was sailing in very little wind.
Construction wise the Black tip looks great, nicely finished without going over the top. To me it looks like simmer cover all the important point of construction whereas ezzy add all the tinsel. My Ezzy's look good and they get a fair amount of use so I'm interested to see what the simmers will look like next year.
Choosing a sail for your board is hard, depends how and where you sail but I'd go for a black tip as an all round sail.
Haven't had the Icon's out of there plastic wrappers yet so can't comment on those. I choose the Icons as an all round wave sail on the advice of others, check out the website.
www.simmerstyle.com/error.aspx?aspxerrorpath=/2010sail/sailOverview.aspx