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Malcolm,
Take a look at Sky at Night Magazine April 2011 (#71) which is currently on the shelves. They do a review of 80mm refractors on page 86 including Explore Scientific ED80, Vixen ED80Sf, Sky Watcher Evostar 80ED Pro and Meade Series 5000 80ED.
Meade was given the winner but only just. Suggest you pickup this issue to have a look.
I own a Meade Series 5000 80mm and very happy with it. It does need a good field flattener though. Its focal length is 480mm though but very sharp. It's a bit thin on features though. I paid $799 for the old runout version last year (single speed Crayford focuser) but optically the same as the current version.
I can not comment on the others although the Williams Optics line up looks nice too which I am looking at the FLT110 currently from Andrews Communications.
Cheers,
Darrin...
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