I have the incase skin, it's an ok case, I also have the SKiN from iqase which I think is a little better, it gives better protection to the front.
In my opinion, skins are a little annoying when it comes to phones, they're too rubbery, sticky. I prefer a good ol case.
I read somewhere that iQase is getting ready to introduce more cases soon, ones that are designed for pocket use, and others that are high quality. I just visited their site and saw the new FLiP2, pretty impressive feature-list. Check it out iQase.com
I think encase, belkin, elan, and especially the DLO are disappointingly cheap in quality.
I have both the incase and the iSkin revo and have used both for their uses. When I am just hanging out and not doing much i use the Revo for its durability. When I go out at night or want to look more professional i used the incase, because of its look and the Revo can tug on the pants when you pull it out and it gets annoying.
Both have their uses, and pros and cons. I like both.