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Ben, aperture is king. If you can't buy a 10" full tube from your local store, find another store. A truss Dob cannot compete with a tube Dob of the same size for contrast. I almost bought a 12" truss Dob but realised a tube would fit in my car so bought that. The collimation never changes in my tube.
My suggestion is you spend a little more now on your telescope, and patiently buy better eyepieces as you can afford them.
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