For a much fuller answer to this question from David Lawver
(dmlawver@facstaff.wisc.edu), Derek Smith (dmsmith@sdcc17.ucsd.edu),
Gareth Hughes (g.hughes@zetnet.co.uk), and Steve Bailey
(SBMTBIKE@worldnet.att.net) see the FAQ appendix at
http://www.blighty.com/ratsfaq/appendix.html

The executive summary:
   * Both Strand and ETC have their supporters
   * ETC have very knowledgable, helpful people
   * The ETC Express is liked for many reasons, including
        * Good engineering at a reasonable price
        * Ethernet support
        * Very nice firmware and UI, for moving lights as well as
          dimmers
        * Show swap compatibility with the expression
   * The GSX has AMX support, but not AMX and DMX simultaneously, and is
     in other respects not as nice as the express. And it costs more
   * And most importantly, if you're considering buying a board rent or
     borrow one for a show to find it's strengths and weaknesses

ETC have a web site at http://www.etcconnect.com/ . Strand lighting are
at http://www.strandlight.com/