One of the trucks, owned by the company I work for, has a DiamondBack on it? They have the SE cover. I think they are pretty cool. I would recommend them.
I have the SE model with the Line-X coating which I'm satisfied on how it turned out. The weather stripping isn't as good as some of the other covers I've had. I believe I have a couple of photos in my gallery.
I'm having one installed tomorrow. It's the uncoated aluminum HD, single ATV, side-load package. They say allow 1.5 hours for install. I'm pretty stoked about the addition, and if anyone has questions after the install (especially after some ownership time) please feel free to contact.