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I owned an ED80 until 2 days ago. GREAT little scope, but if you do any visual, you will be disappointed (whilst sharp, the images with all but high magnification are SMALL)/Nice wide FOV with it, but small image.
It has been said that 102mm is a "sweet spot" for refractors. I tend to vehemently AGREE, having owned both much larger and smaller refractors. I think anything above 102mm, you go reflector/cassegrain, andyhting below is pure refractor. I also owned a 100mm Skywatcher, and whist reasonably good, it was not QUITE right.
It was a LONG and expensive road arriving at my final telescope choices - Vixen FL102S refractor (no longer produced, now a highly sought after classic) and a Vixen R200SS f/4 astrograph reflector (more than 20 years old, and no sign of ANY mirror deterioration whatsoever).
I am still getting used to the R200SS. It is finicky in the extreme, but the images are superb - it is my dedicated wide field and FAINT platform, whereas the refractor is DSO, planetary and visual.
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