I love EPCOT! It's one of my favorite places ever.
I agree with a PP that said that Coral Reef would be nice ... my mom and I had a truly magical experience there. We were so lucky and got to sit right next to the fish tank and watch the sea life in it ... so beautiful. And the kids there seemed to love it, and it would be romantic for you and your DH.
However, I also love the main resteraunt(sp?) at the Mexico pavilion, however it helps to have adventerous(geez can't spell) eaters because the meals aren't typical of normal Mexican resteraunts(sp) (forgot what it's called!). Make sure you leave plenty of time for dining because they are a bit on the slow side. There is neat shopping and a ride inside that now features Donald Duck(I didn't read your post too closely to see if you've been before so sorry if I sound like I'm talking to a first timer!). We had one of my pre wedding meals there and it was beautiful and romantic.
Whatever you choose will be great!! I liked the main resteraunt(sp) in Morocco as well, but don't know how kid friendly it is; I'm sure they have choices for kids. The belly dancer is fun! Have fun and hope I helped some!