My biggest worry, when implementing a new software package, is the aesthetic quality - software that is ugly or difficult to navigate likely won't win the hearts of its users. XenForo includes a simple color changer and you can make further changes through an extensive style property editor. The thing that caught my eye is that you can edit the HTML and CSS in a text editor. I have been writing HTML, CSS, and php for years and this is indeed a blessing. Xenforo appears to have been a great choice. Thank you, CF.Net!