Its getting a bit too specific for me to comment, but I don't think I've ever heard one person comment about a xarmor keyboard here and have no experience with one personally. Going with just plain reputation in my books, the DAS is miles ahead.
If media keys are important, the BlackWidow might actually be a board you want to consider. It's got a function layer with media keys, tho you'll have to live with a slightly larger keyboard case and some macro keys.