It's not clear if you have looked through a scope of this type and size before but if you haven't perhaps the advice from Mike Q is a good place to start. I have come across two types of people who get a furst look through a telescope:
Type 1: WOW! That's incredible. (I include myself in that group when I first looked through my Orion 8" dob).
Type 2: Is that it? You mean that little spec is a galaxy, looks more like smudge. Are you sure it's not a smudge? I've seen pictures of Saturn, what else can you see?
I would hope you fall into the first category or at least grow into it.
Anyway, just sharing a thought and an experience. Both scopes look good to me btw.
Accessories: eyepieces of course. A collimator. Some form of finder, I like the little red dot type but also use a small finder scope. A large order of patience, you can never have too much of that>
Good luck and enjoy the ride.