I've used an LX200R 10" once for a few days with a 20Da last year. This was with a 6.3 FR and autoguided with my ED80 refractor and barlow. We got a few ok shots out of it but I was glad to go back to imaging through my ED80 for my sanities sake.
BTW what are you going to image with? If you are using a smallish chip CCD then you could get away with using the 3.3 FR which will make it a much easier deal to image with. Especially if the CCD Camera has a built in autoguide chip
