I suppose there doesn't seem to be anyone here who has actually any experience with the SXD especially for imaging
Over on the Sphinx yahoo forum there is at least one user who said that while it is capable for astroimaging, it is not as fit for that purpose as a Losmandy G8..this may be again may be one person's view
as for Meade, I hope they pull out of their current well documented problems but the prognosis doesn't look good for them -on current course and speed of course
http://biz.yahoo.com/pz/071101/130402.html?printer=1