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I run a 10" f5 imaging newt (carbon fibre tube struts) that I built myself. I used easily sourced GSO mirrors and rack and pinion focuser. It holds my cold finger cooled Canon which is pretty heavy. I had a GSO 8" imaging newt prior to the build and it seemed solid enough with no obvious weaknesses. I can also recommend having a look at the Skywatcher MN190 Mak-Newt, a seriously good scope with ( I kid you not) large ED APO type performance at a faster f ratio. It is in my opinion the equivalent of a 6" APO at one-third the price. I woukd not go above 10" of aperture on a NEQ6, and the MN190 weighs about the same as the 10" newt. Don't be put off my the low entry price for newts, they are the best value aperture tgat you can buy - and refractors are the most expensive at comparative f and focal length. You can have a lot of fun with a budget newt and not worry so much about it.
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