Since you have 3 nights and want awesomeness... I'd suggest one of the 3 Monorail resorts (Contemporary, Polynesian, Grand Floridian). They are all a quick trip to the Magic Kingdom, and relatively quick to Epcot on the monorail. All can give you a great stay, with good food and luxurious service and surroundings (especially on the club/concierge level).
Me, I'd go for the Theme Park View rooms in the Contemporary. A private balcony for the fireworks every night is a memory that's hard to top.
If your kids love a pool, and you are going to take time to use the one at the resort, the Polynesian is the ticket for you. The pool is Awesome, as is the rest of the resort.
Be sure to make reservations for a character meal (breakfast seems best) if your kids are young enough to enjoy one. Each of these 3 resorts offers a different one. But you can reserve whichever has the characters your kids like best.
Contemporary - Chef Mickey's (buffet with Mickey, Minnie, Goofy, Donald)
Polynesian - Ohana (Family style - characters @ breakfast only with Lilo, Stitch, Mickey & Pluto)
Grand Floridian - 1900 Park Fair (buffet with Mary Poppins, Mad hatter, Alice from Wonderland)
You might find the accommodations pages for these 3 on Allears.net more helpful for a quick read than trying to follow the threads here. Here's the links.
Contemporary -
http://allears.net/acc/faq_con.htm
Polynesian -
http://allears.net/acc/faq_poly.htm
Grand Floridian -
http://allears.net/acc/faq_gf.htm
I'm sure you'll have a great time no matter which you choose!