In July 2009 I purchased a used Celestron Nexstar 11 GPS and a Starizona Hyperstar III. I was intrigued by the advantages of imaging at F2 and after reading posts by a number of users and seeing a link on the Starizona site to a user who had imaged an all 110 Messier objects during a Messier marathon I was convinced. Imaging is so much faster with this system that you can actually image many objects in Alt-Az mode. Mount inaccuracies are minimized and occasional frames ruined by clouds, etc aren't as big a deal when you are shooting 30-90 second subframes rather than 10 minute subs. Also my imaging is usually done from my observatory and the equipent I usually use is not portable. When imaging with the Nexstar fork mount I can actually take astrophotos at our monthly club star parties or other remote locations if I choose to.