(1) If money is not an issue: stay deluxe in Epcot or MK area
*Epcot area resort - BWI or YC
*MK area - depends upon the theme you like best - all are awesome! (Most romantic - Polynesian)
(2). slightly smaller rooms and a little lower priced, but still deluxe:
*AKL - animals from your balcony, incredible theme, great food
WL - boat top the MK, secluded, great theme
(3) lower prices, but good value
*CSR - more upscale than the other moderates, IMO, with more amenities
*CBR - relaxing tropical island atmosphere, will soon have the Skyliner transport
POR/POFQ - boat to DS, use amenities at both resorts regardless of where you stay
(4) on a budget?
*Pop Century - newly refurbed rooms are nice, Skyliner, walk to AoA
All Stars - lowest price option except for camping in FW
My first choice would be the Poly, GF or CR if you plan on spending time at the MK or just love to look at the castle from your resort. If you want to walk/boat to two theme parks and/or will have park hoppers, an Epcot area resort might be more convenient. YC is a nice choice for adults only in Epcot area, IMO.
To save some $$ and still have a fabulous deluxe experience, or if you just love animals, a stay at the AKL would be an awesome choice! We stay here as part of a split stay on many of our WDW visits. The food and theming are incredible! Its is a bit distant to the MK, but it doesn't bother us. just an extra 5 - 10 minutes on the bus.
CSR is awesome and beautiful! With the new restaurant on the water and there tower with indoor corridor options, this is a great resort for a moderate choice for a couple. Fitness centre, salon and the best pool after Storm Along Bay are some of our reasons to love this resort.
Pop Century is actually quite nice as a value option. Staying here with a view of the lake saves a lot of money for use on extras like add on events (DAH or EMM), signature dinner choices. or specialty tours.
Good luck choosing!