A Celestron Nextstar 6 SE was for about 3 years my main instrument. It was initialy used in combination with a Celestron NexImage camera and afterwards with an Imaging Source camera to produce planetary astrophotography and also double star measurements.
Even if this telescope is for a long time history ( I replaced it with the CPC800 ) i wanted to mention it here because it served me about 3 years between 2009 until 2012, and it gave me great results and a lot of satisfaction. You can see the results of this instrument in the results section.