I am having the same issue!! I am/was sure that I was going to book Morocco but now I am having second thoughts. Here are my pro and con's, they may differ from yours, but hope it helps!
Epcot
Pros:
-the "wow" factor of being in a park to watch the fireworks
-I am staying at BC, so we, and possibly other guest can walk
-VIP feeling of being in a secluded area in a busy park (I know it sounds a little odd, but hey, I like feeling special once in awhile

)
-The food generally seems to be cheaper
Cons:
-venue fee
-viewing fee's for people without park tickets
-if not offering transportation, there could be a mad scramble to share with park guests
Sago Cay
Pros:
-more money spent on food, less on venue and viewing fees (for example, I could spend $1000 at SC, which means I am getting over $50 in food a person, but for the same price at Epcot, it would prob be more like $30 pp)
-Get pics at the GF (if you haven't already)
-Still a really nice area
-probably less noise than Epcot (although I am not sure)
Cons
-not in a park, may feel like an "outsider" unless you pipe in music
-for me, it's transportation for myself that I don't need if EP
-possibly not as much of a "wow" factor as EP
As you can tell, I really don't know what to do either! Since I am having a noon ceremony, we are having a "cocktail" menu instead of desserts for a DP since people will be hungry again. I can't decide if I want to spend more on food and bev, and go to Sago Cay, or more on ambiance, and go to Epcot
