I second JB K. If you build it yourself, you can be sure of the quality, and better yet. You know what you are doing so that you can repair as necessary. I hammer on pixel blades, and they rarely have issues, but would be much more concerned if I knew I would have to send it off if something went wrong.
Also, they are very easy to build and there are great videos to walk you through by Rob/TCSS and others.