Hello, I have been using Sparky XFCE desktop and love it...One thing I noticed that wasn't installed by default was ( gtk2-engines-murrine). I anyone is interested open up synaptic and type in (murrine) and install (gtk2-engines-murrine). It helps make you themes in XFCE look a lot better, more smooth looking. More true to the way the themes are ment to look.
Just a tip....hope you like!