For SCTs - both the Meade R series and the Celestrons seem to have alot going for them and folk here have used them well.
Some perform better than others - for budget and initial use I chose a Carbon Fibre 9.25 Celestron. I initially got this on a CG5, then added a Meade Motorfocus, then a JMI PC/USB focus controller, then added a Megrez 80mm refractor for guiding, moved to a Vixen Atlux mount on a pier and finally moved to Losmandy saddles and rings. Not cheap but I am very happy wih the result.
During my research I heard alot of feedback that the 9.25" Celestrons and the 14" where the pick of the Celestron range - and had really good flat fields ideal for imaging. I liked the idea of a carbon fibre tube - to minimise temperature related focus management. I have re-focused due to temperature just twice in a year! Some people with high end apo's I hear re-focus after each colour channel!
If you are starting without a clear goal, choose between a 5" or 6" fork mounted SCT, or a 80mm - 100mm ed refractor or a large dob, that link to the second hand 8" SCT seemed like a real good deal to me!
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