I would say #1, Saxon is more or less owned by Sky Watcher which is a very reputable brand. It is cheaper than the GSO, you can pick it up (you would still have to pay delivery for the DSO) PLUS with the money left over you'll be able to put a couple of half decent eye piece. The ones that come with telescopes are typically not good for anything other than book stops haha
I would suggest a Full Tube over a collapsable for two reasons.
1) A full tube will hold collimation where as a collapsable doesn't. Collimation is having the primary (big mirror) and secondary (little mirror) correctly aligned with one another.
2) My understanding is that a lot of collapsable dobs have more issues with tube currents which wash away fine details (important when looking at either the moon or planets).