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The 8 inch is a nice size but the 10 inch will see "more" (fainter/detail) because it has a bigger mirror...So if it is faint fuzzies that you want to see get the biggest aperture that you can afford.
I am not sure that I see the advantage of an 8 inch truss dob (like the Lightbridge). space for mirror box/base truss poles and secondary I don't think the foot print would be that much smaller...it might be a better utilizer of space though.
If I was going to go with 8 inches for budget reasons the GSO is hard to pass up in my opinion.
I started with an 8 inch GSO and still use it...it is a nice all around scope for the money. You will be able to spend a life time finding new things even with an 8 inch. Heck, 10- 15 years ago an 8 inch scope would have been considered "big" by many.
Good Luck!
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