Hi Dave.
My first "big" scope was an 8" dob. I found it to be a very capable instrument and provided me with years of enjoyment. Easy to transport and set up, and with the money you save on a bigger scope, spend it on some premium eyepieces, etc. Also an 8" dob is a good learning scope in collimation, practicing to locate various objects and to keep an object in view.
Whatever you choose, good luck!
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