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You will get a lot of varying opinions on this question, sort of like asking what's the best car. It's all about what you want to do with it. As an all-rounder, and if I could only have one that can do both I'd suggest something like a 10" newt (I prefer f5) with a slightly oversized secondary for imaging work but which can still be used for visual with an extension tube. These scopes tend to be very cheap and of good quality with good limiting magnitude and resolution. I should point out that I have one, but I also have a 16" f 4.5 dob, a f12 achro refractor, and ED Triplet f6 refractor, the newt gets use the most but they all have their own advantages at times.
Personally I'd avoid very fast Newts as they are hard to collimate, so don't travel well and really don't offer any advantages to imagers - where a few seconds less sub exposure time is irrelevant when you are guiding and on a good mount; but that's just my opinion.
Last edited by glend; 29-03-2015 at 02:35 PM.
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