I forgot to add! If you want 20 or more guests and can live without using the wedding pavilion--the Swan & Dolphin is a GREAT option. We considered it...except we realized the entire reason we want our wedding at Disney is to have it AT DISNEY...not just a hotel next door. Something uniquely Disney.
My personal opinion is that as pretty as the wedding pavilion is, it doesn't scream "This is a Disney location" to me (aside from maybe the carriages on the window and the cool little aisle runners). If I just wanted a pretty chapel though--then I could get married ANYWHERE and just do a honeymoon at Disney. That's why we decided against S/D...pretty location, LOTS cheaper...but not a signature Disney location.
So--it's up to you. If you don't care about having a "uniquely Disney-looking" location, then I really think you could get exactly what you want (except the wedding pavilion) at the Swan & Dolphin for a lot less. They sent me a brochure, and my jaw dropped to the floor for what a better deal they are compared to Disney. You can even still have Mickey and Minnie come to the wedding. AND, in your case--there is no minimum or maximum guest count--so no upgrading to Wishes and paying all the pesky minimums.
I hope you find what's best for you. In all honesty--for me, I'm paying for Wishes because I WANT to be married IN EPCOT. The pavilion is just another dressed up chapel. If you're not concerned about the scenery being "Disney"--go S&D. You'll get more for your money.
Tiffiny