Here are my suggestions - things that fit me but feel free to ignore anything i have to say!
If you do plan to stay with a moderate resort, I would go with Carribean Beach Resort or Port Orleans Riverside. They are both romantic in different ways. CBR is beaches and such where as POR has the charm of like Gone With the Wind.
If you decide to upgrade to a delux resort, My choice would be the Wilderness Lodge. Its rustic and you can hop on a boat to MK. The monorail Resorts (Poly, Grand Floridian and Contemporary) are nice too but for ME there is just something about WL.
Restaraunts - if you want to ultimate romantic meal, you must book at Cinderella's Royal Table at Epcot. You have to book as far out as possible but that will be worth every penney. The Crystal Palace is nice as well.
At MGM - the Hollywood Brown Derby is the ultimate. But there are lots of fun themed ones that you should look into as well.
For Epcot - You have all the countries to choose from. Whatever cuisine you enjoy, its most likely there!
Hope this helped a bit. Ask anything that pops in your head... (I do this for a living so I can get most any info you want!)