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If you can afford and move/lift a 10" (or 12") go for it.
I wouldn't worry about flexitubes flexing etc. i've got a 12" and its fantastic. there are also advantages of flexitubes, less turbulance when getting the scope to temp, easier to move and store. collimation will need to be done regardless of solid tube or truss. infact i find it easier to collimate with flexitube as you can look directly at the secondary mirror whilst adjusting the primary (when using a barlowed laser).
all the best!
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