I have a Celestron C 8 NGT-8 inch newt on a goto-ok its quite a bit bulkier than an SCT but it has GoTo, can be autoguided and can be used for deepspace astrophotography with a webcam or DSLR..and costs $1000 or more less than the LX90..around $500 more than for the second hand non goto that you are considering
I am obviously very happy with it or wouldnt suggest it to anyone
check out the Celestron AS Series yahoo group for more if you are interested
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