I just purchased my third one, so I have 85mm, 127mm and now I just purchased the ES 152 carbon fiber triplet from another member with a whopping 1216 focal length un-reduced. It comes with and I have already the 3" reducer.
Am I getting sick to have three refractors? Is there something wrong with my head? Perhaps 1 should sell the127 but is has such nice glass, FCD100. I doubt I will use it though since I got a 6" now.
My signature says it all:-). I have refractors from 60mm up to 152 mm in 1 inch increments. Plus a Lunt 60 mm H alpha scope, and duplicates at 80 mm( F15 achro) and 120 mm(F8 Achro). That is just the refractors. I do try to use them all. Do I NEED all of them? No of course not. But Astronomy is my one hobby, I do not drink, I do not smoke and I work hard. Some people collect guns, or baseball cards. I like telescopes. Most of my scopes(refractors, Cats, etc...). are representative of a certain type of design and/or vintage. Most were obtained used, some for really good deals.
My 60 mm Sears achro is used by my son when we go out. He loves it. My 80 mm Triplet is for wide field imaging. My TV102 is used for grab and go visual observing primarily at the moment. My 127 mm AP Starfire I use for both imaging and visual, and my 152 mm F9 AP Starfire I use for planet imaging and visual. My F15 80 mm Achro is an excellent example of that type of vintage scope that I use occasionally for visual work. And my 120 mm F8.3 Celestron/Synta is an excellent example of that venerable scope that some day I might convert to H Alpha.
I am in a place now where the urge to add to the collection has lessened and what I REALLY want is more time under clear skies, lol.... I can see retirement on the horizon and I am looking forward to it. If I WERE to add another, top of the list would be a TMB 152 mm F8 Triplet with LZOS optics.
3 refactors is a drop in the bucket, compared to many folks:-). The answer to your question depends on what YOU want to accomplish and what you can afford. If financial hardship hit, I would sell all my scopes without hesitation, but would try to keep the 80 mm Triplet, the TV 102 and the 127 mm AP. That would REALLY cover my needs both visually and for imaging. YMMV.