I am now running the site on Expression Engine.  While Wordpress is very capable with many, many plugins to extend its functionality I found that it came at a price.  Many haphazardly coded plugins means much time slugging through incompatibilities and unworking code. 
Expression Engine is clean, easy and wildly flexible.  Many things I struggled with in Wordpress are a breeze and the things that are harder aren’t worth it anyway.  It also gave me the opportunity to start from scratch and clean up some CSS and HTML a bit, make things look nicer.